Search PBS Space Time

What are you looking for?

	2022-11-23: How To See Black Holes By Catching Neutrinos 12:01: ... can also look for neutrino Cherenkov radiation at radio wavelengths, which allows us to scan vast tracks of the Antarctic ... 12:21: One possibility is looking for radio-Cherenkov from the Moon.
	2022-11-16: Are there Undiscovered Elements Beyond The Periodic Table? 02:48: ... foil has been rendered radioactive in the accelerator, and Segre and his colleague Carlo Perrier were able ... 03:57: A more common term is radioactive, which we tend to associate with very heavy elements like uranium and plutonium. 15:25: The elements we will discover in the island of stability will be very heavy, initially hard to synthesize, and somewhat radioactive. 16:17: It’s mildly radioactive, extremely useful in medical imaging, and is the critical catalyst for low-temperature fusion. 02:48: ... foil has been rendered radioactive in the accelerator, and Segre and his colleague Carlo Perrier were able ... 03:57: A more common term is radioactive, which we tend to associate with very heavy elements like uranium and plutonium. 15:25: The elements we will discover in the island of stability will be very heavy, initially hard to synthesize, and somewhat radioactive. 16:17: It’s mildly radioactive, extremely useful in medical imaging, and is the critical catalyst for low-temperature fusion.
	2022-10-12: The REAL Possibility of Mapping Alien Planets! 01:25: ... of the Milky Way.   These were taken by bringing together radio signals from telescopes all across the planet,   effectively giving us ...
	2022-06-30: Could We Decode Alien Physics? 14:09: ... so we’ve used your contribution   to blast our own radio beam to hundreds of nearby stellar systems. It contains our own ... 00:00: ... the perhaps not too distant future, every radio telescope on Earth receives the same massive data   dump from what can ...
	2022-03-23: Where Is The Center of The Universe? 18:20: Anarchy Antz asks if there’s any update on the radio signal from the direction of Proxima detected by the Breakthrough Listen project. 18:31: ... Radio astronomer Sofia Sheikh found around 60 similar signals that were not ... 18:20: Anarchy Antz asks if there’s any update on the radio signal from the direction of Proxima detected by the Breakthrough Listen project.
	2022-02-16: Is The Wave Function The Building Block of Reality? 01:24: ... Schrodinger’s cat. A scientist puts a cute kitty in a closed box with a radioactive atom attached to a vial of poison gas. The atom has a 50-50 chance of ... 02:24: ... particles. So how far can the superposition extend? The atom, the radioactive detector, the vial of poison, the cat, the ... 01:24: ... Schrodinger’s cat. A scientist puts a cute kitty in a closed box with a radioactive atom attached to a vial of poison gas. The atom has a 50-50 chance of ... 02:24: ... particles. So how far can the superposition extend? The atom, the radioactive detector, the vial of poison, the cat, the ... 01:24: ... Schrodinger’s cat. A scientist puts a cute kitty in a closed box with a radioactive atom attached to a vial of poison gas. The atom has a 50-50 chance of ... 02:24: ... particles. So how far can the superposition extend? The atom, the radioactive detector, the vial of poison, the cat, the ...
	2021-12-29: How to Find ALIEN Dyson Spheres 05:27: ... candidate Dyson spheres, to be followed up by scanning for narrow-band radio emission, a much more telling signature of ...
	2021-10-13: New Results in Quantum Tunneling vs. The Speed of Light 02:22: In radioactive decay, particles that should never have enough energy to escape the nucleus are found to leak out. 03:55: We see tunneling everywhere, in radioactive decay of course, but this tunneling also drives many other important processes. 02:22: In radioactive decay, particles that should never have enough energy to escape the nucleus are found to leak out. 03:55: We see tunneling everywhere, in radioactive decay of course, but this tunneling also drives many other important processes. 02:22: In radioactive decay, particles that should never have enough energy to escape the nucleus are found to leak out. 03:55: We see tunneling everywhere, in radioactive decay of course, but this tunneling also drives many other important processes. 02:22: In radioactive decay, particles that should never have enough energy to escape the nucleus are found to leak out.
	2021-09-07: First Detection of Light from Behind a Black Hole 01:13: We talked about this soon after it came out - but to remind you, here we have radio light from charged particles whirling around the black hole. 01:28: ... - a team of hundreds of scientists and engineers synthesizing data from radio telescopes across the ... 01:13: We talked about this soon after it came out - but to remind you, here we have radio light from charged particles whirling around the black hole. 01:28: ... - a team of hundreds of scientists and engineers synthesizing data from radio telescopes across the ...
	2021-08-10: How to Communicate Across the Quantum Multiverse 16:58: ... see that field in many ways, including by watching the radio light emitted by electrons spiraling in that magnetic field - what we ...
	2021-07-21: How Magnetism Shapes The Universe 07:15: When radio waves interact with those electrons, their polarizations are also affected. 08:12: So by measuring the Faraday rotation of distant radio sources we can also map magnetic fields. 12:14: In some cases, these jets puncture the galaxy and plume out in radio lobes which can dwarf the entire galaxy that spawned them. 12:23: ... carry magnetic fields out into the cosmos, and we see them through the radio light emitted by electrons that spiral slowly in these vast ... 12:14: In some cases, these jets puncture the galaxy and plume out in radio lobes which can dwarf the entire galaxy that spawned them. 08:12: So by measuring the Faraday rotation of distant radio sources we can also map magnetic fields. 07:15: When radio waves interact with those electrons, their polarizations are also affected.
	2021-07-13: Where Are The Worlds In Many Worlds? 00:20: ... one branch of the splitting quantum multiverse a radioactive nucleus decay, in another it doesn’t; in one “world” a quantum event in ...
	2021-05-25: What If (Tiny) Black Holes Are Everywhere? 03:08: ... waves with kilometers-long wavelengths, so really, really low energy radio ...
	2021-05-11: How To Know If It's Aliens 05:11: ... the signature of phosphine in the upper atmosphere of Venus from radio data taken with ALMA, the Atacama Large Millimeter/submillimeter Array. ... 09:58: ... Many of you have heard of the WOW signal. This was a weird spike of radio emission detected by the Big Ear radio telescope at Ohio State ... 10:35: ... has it? On April 29th, 2019 the Parkes Radio Telescope in Australia was studying the flare activity of Proxima ... 09:58: ... State University. There was one idea that a pair of comets were in the radio beam at the time, but the Ohio State astronomers insist that those comets ... 05:11: ... the signature of phosphine in the upper atmosphere of Venus from radio data taken with ALMA, the Atacama Large Millimeter/submillimeter Array. ... 09:58: ... Many of you have heard of the WOW signal. This was a weird spike of radio emission detected by the Big Ear radio telescope at Ohio State University. There ... 10:35: ... of Proxima Centauri - our nearest stellar neighbor. A sharp spike of radio emission appeared at 982.002 MHz and then drifted upwards in frequency over a 3 ... 09:58: ... Many of you have heard of the WOW signal. This was a weird spike of radio emission detected by the Big Ear radio telescope at Ohio State University. There was one ... 10:35: ... was re-analyzing the data. There are lots of non-alien sources of radio frequency blips - mostly human-made noise. But Breakthrough Listen has detailed ... 09:58: ... signal. This was a weird spike of radio emission detected by the Big Ear radio telescope at Ohio State University. There was one idea that a pair of comets were ... 10:35: ... has it? On April 29th, 2019 the Parkes Radio Telescope in Australia was studying the flare activity of Proxima Centauri - our ... 00:24: ... one of these, samples were injected with a nutrient solution laced with radioactive carbon. The idea of this labeled release experiment was that living ...
	2021-04-07: Why the Muon g-2 Results Are So Exciting! 07:11: Muons are nice, because they're easily produced in radioactive decay.
	2021-03-23: Zeno's Paradox & The Quantum Zeno Effect 05:23: ... in principle this would also work for radioactive decay, even chemical reactions The basic idea of the quantum Zeno effect ... 06:00: A constant radio-frequency field is tuned to cause electrons to oscillate smoothly between two energy levels - call them 1 and 2.
	2021-03-09: How Does Gravity Affect Light? 03:56: ... thought of as a clock - be it an electric charge pulsing up and down a radio antenna, or an atom vibrating back and forth in a glowing light filament ...
	2021-02-24: Does Time Cause Gravity? 09:04: They’re from a number of different radio telescopes, but were collated by the Parkes Observatory in Australia.
	2021-02-17: Gravitational Wave Background Discovered? 00:00: ... rotational rates the magnetized plasma between the stars also slows radio waves from pulsars and the relative motion of the earth the sun and the ...
	2020-11-04: Electroweak Theory and the Origin of the Fundamental Forces 01:02: You may have heard that it’s the force responsible for some types of radioactive decay. 01:24: It’s one of the main ways radioactive nuclei decay - the other being alpha decay, where the emitted “alpha particle” is really a helium-4 nucleus. 01:02: You may have heard that it’s the force responsible for some types of radioactive decay. 01:24: It’s one of the main ways radioactive nuclei decay - the other being alpha decay, where the emitted “alpha particle” is really a helium-4 nucleus. 01:02: You may have heard that it’s the force responsible for some types of radioactive decay. 01:24: It’s one of the main ways radioactive nuclei decay - the other being alpha decay, where the emitted “alpha particle” is really a helium-4 nucleus.
	2020-10-05: Venus May Have Life! 03:58: This can be done at far infrared and submillimeter radio wavelengths where the star’s own glare doesn’t kill the signal.
	2020-08-17: How Stars Destroy Each Other 06:16: ... past the earth to produce metronome-precise pulses - most brightly in radio light, but potentially at all ... 07:09: ... much always accompanied by the classic metronome-precise pulses of radio ... 08:35: The same gas blocks any radio light, but allows the more penetrating gamma ray light to pass through. 06:16: ... past the earth to produce metronome-precise pulses - most brightly in radio light, but potentially at all ... 07:09: ... much always accompanied by the classic metronome-precise pulses of radio light. ... 08:35: The same gas blocks any radio light, but allows the more penetrating gamma ray light to pass through.
	2020-08-10: Theory of Everything Controversies: Livestream 00:00: ... work either my provocative quote is that the scientific method is the radio edit of great science but lee you've even gone further and said ...
	2020-07-08: Does Antimatter Explain Why There's Something Rather Than Nothing? 05:43: ... - are created all the time in nature - for example in the Sun, or in radioactive decay, or when cosmic rays hit the atmosphere, which is how antimatter ... 08:29: Positrons also fly into this trap from a radioactive sodium-22 source, and pair up with the anti-protons, creating anti-hydrogen. 05:43: ... - are created all the time in nature - for example in the Sun, or in radioactive decay, or when cosmic rays hit the atmosphere, which is how antimatter ... 08:29: Positrons also fly into this trap from a radioactive sodium-22 source, and pair up with the anti-protons, creating anti-hydrogen. 05:43: ... - are created all the time in nature - for example in the Sun, or in radioactive decay, or when cosmic rays hit the atmosphere, which is how antimatter was ... 08:29: Positrons also fly into this trap from a radioactive sodium-22 source, and pair up with the anti-protons, creating anti-hydrogen. 08:00: ... the Antiproton Decelerator, where they are slowed down by pulses of radiofrequency electric fields as they travel around the ring. They can then be ...
	2020-06-08: Can Viruses Travel Between Planets? 07:38: ... is radiopanspermia, and it’s a compelling way to transport viruses because the mechanism is ... 10:37: ... likely UV exposure would destroy most viruses trying to hitch rides via radiopanspermia - and that’s good, because that’s the only known way to really spread ...
	2020-05-04: How We Know The Universe is Ancient 03:24: ... “big bang” was coined by the astronomer Fred Hoyle during a 1950 BBC radio broadcast. But not to popularize the idea - rather to mock it. Hoyle was ... 00:17: ... recent episode we learned how we calculate the age of the Earth based on radioactive decay in its most ancient ...
	2020-04-28: Space Time Livestream: Ask Matt Anything 00:00: ... a lot here the worst book by far is my PhD thesis the host galaxies of radio loud active galactic nuclei I think it's only been read by the three ...
	2020-04-14: Was the Milky Way a Quasar? 10:51: ... MeerKAT telescope array discovered a handful of never-before-seen radio structures throughout the Galaxy — including two bubble-shaped ... 11:07: Just like the Fermi Bubbles, these radio bubbles seem to originate from our central black hole and extend in opposite directions above and below. 11:41: ... the energy required to power these radio bubbles is several thousand times lower than that required for the Fermi ... 11:07: Just like the Fermi Bubbles, these radio bubbles seem to originate from our central black hole and extend in opposite directions above and below. 11:41: ... the energy required to power these radio bubbles is several thousand times lower than that required for the Fermi ... 10:51: ... MeerKAT telescope array discovered a handful of never-before-seen radio structures throughout the Galaxy — including two bubble-shaped structures extending ... 14:01: ... the first to get the right age for the earth, significantly advance this radiometric dating technique, but he also discovered the disastrous lead levels in ...
	2020-04-07: How We Know The Earth Is Ancient 06:36: ... discovery of X-rays in 1895, and the discovery of radioactivity a year later, would open up a new world within the atom – and yield new ... 06:47: ... Rutherford, discovered that certain elements released energy from radioactive decay at an ever-decreasing rate. And that some of those elements would ... 07:17: ... the discovery of radioactivity also gave us our most accurate way to figure out the age of chunks of ... 07:58: ... - that’s the version or “isotope” of carbon with 8 neutrons. It’s radioactive, and decays with a half-life of 5,700 ... 06:47: ... Rutherford, discovered that certain elements released energy from radioactive decay at an ever-decreasing rate. And that some of those elements would ... 07:17: ... in terms of “half-life” - which is the amount of time for a given radioactive nucleus to have a 50% chance of decaying; or equivalently, the amount of ... 07:58: ... - that’s the version or “isotope” of carbon with 8 neutrons. It’s radioactive, and decays with a half-life of 5,700 ... 06:47: ... Rutherford, discovered that certain elements released energy from radioactive decay at an ever-decreasing rate. And that some of those elements would slowly ... 07:17: ... of the stuff there was to start with you can figure out how long the radioactive material has been ... 06:36: ... discovery of X-rays in 1895, and the discovery of radioactivity a year later, would open up a new world within the atom – and yield new ... 07:17: ... the discovery of radioactivity also gave us our most accurate way to figure out the age of chunks of ... 10:22: ... is that the different half-lives of each uranium isotope means this radiometric technique is useful between hundreds of millions of years to many ... 10:35: ... that the Earth was between 1.6 to 3.0 billion years old, based on his radiometric dating. This was around the same time that astronomers proved that ... 11:02: ... have been found as old as 4.4 billion years, based on uranium-lead radiometric dating. But to go beyond that date we have to look beyond the Earth. We ... 11:55: ... of solar system. Nearly 4.6 billion years - we get the same number from radiometric dating of solar system meteorites and also from our calculations of the ... 07:17: ... most accurate way to figure out the age of chunks of the Earth through radiometric dating. Unstable atomic nuclei decay into lighter nuclei by splitting or ... 10:22: ... is that the different half-lives of each uranium isotope means this radiometric technique is useful between hundreds of millions of years to many ... 10:35: ... that the Earth was between 1.6 to 3.0 billion years old, based on his radiometric dating. This was around the same time that astronomers proved that ... 11:02: ... have been found as old as 4.4 billion years, based on uranium-lead radiometric dating. But to go beyond that date we have to look beyond the Earth. We ... 11:55: ... of solar system. Nearly 4.6 billion years - we get the same number from radiometric dating of solar system meteorites and also from our calculations of the ... 07:17: ... most accurate way to figure out the age of chunks of the Earth through radiometric dating. Unstable atomic nuclei decay into lighter nuclei by splitting or by ... 10:35: ... that the Earth was between 1.6 to 3.0 billion years old, based on his radiometric dating. This was around the same time that astronomers proved that Immanuel ... 11:02: ... have been found as old as 4.4 billion years, based on uranium-lead radiometric dating. But to go beyond that date we have to look beyond the Earth. We believe ... 11:55: ... of solar system. Nearly 4.6 billion years - we get the same number from radiometric dating of solar system meteorites and also from our calculations of the age of ... 07:17: ... most accurate way to figure out the age of chunks of the Earth through radiometric dating. Unstable atomic nuclei decay into lighter nuclei by splitting or by ejecting ... 10:22: ... is that the different half-lives of each uranium isotope means this radiometric technique is useful between hundreds of millions of years to many billions of ... 11:02: ... formed. The Apollo missions brought back lunar specimens that have been radiometrically dated to 4.5. billion ...
	2020-03-16: How Do Quantum States Manifest In The Classical World? 00:20: ... is in an opaque box with a vial of deadly poison that’s released on the radioactive decay of an ...
	2020-03-03: Does Quantum Immortality Save Schrödinger's Cat? 02:25: As a refresher: a cat is in an opaque box with a vial of deadly poison, which is released on the radioactive decay of an atom. 02:33: ... a totally random 50-50 chance of the radioactive decay over a certain period of time - that means the quantum ... 03:32: ... instead of a vial of poison attached to one radioactive atom, connect the vial to many atoms - so that the poison is released if ... 02:25: As a refresher: a cat is in an opaque box with a vial of deadly poison, which is released on the radioactive decay of an atom. 02:33: ... a totally random 50-50 chance of the radioactive decay over a certain period of time - that means the quantum ... 03:32: ... instead of a vial of poison attached to one radioactive atom, connect the vial to many atoms - so that the poison is released if ... 02:25: As a refresher: a cat is in an opaque box with a vial of deadly poison, which is released on the radioactive decay of an atom. 02:33: ... a totally random 50-50 chance of the radioactive decay over a certain period of time - that means the quantum wavefunction of ...
	2020-01-13: How To Capture Black Holes 00:24: ... in a new way we discover new things. When we figured out how to see in radio waves quasars and supernova remnants lit up the sky, When we learned to ...
	2019-12-02: Is The Universe Finite? 00:33: We can’t see this microwave light with our eyes, but we can catch it with even a simple radio antenna.
	2019-10-15: Loop Quantum Gravity Explained 12:41: ... high-energy gamma rays travelling a wee bit slower than low energy radio waves due to the way they propagate through the graininess of a loop ...
	2019-08-12: Exploring Arecibo in VR 180 00:13: ... And today, we've bought a 180 camera to check out this incredible radio telescope. Let's ... 01:02: ... is literally an entire valley filled with a radio telescope and let me get out of your way so you can see this That dish ... 00:13: ... And today, we've bought a 180 camera to check out this incredible radio telescope. Let's ... 01:02: ... is literally an entire valley filled with a radio telescope and let me get out of your way so you can see this That dish is 305 ...
	2019-07-01: Thorium and the Future of Nuclear Energy 00:33: ... power plants than ever died in nuclear reactor accidents In fact, the radioactivity around coal fire plants is also higher due to the traced but completely ... 02:49: ... uranium on the actinide sequence of the periodic table They are very radioactive and have half-lives of tens of thousands of years That means they're ... 00:33: ... fire plants is also higher due to the traced but completely uncontained radioactive products of coal burning But the most compelling attraction is that ... 02:49: ... uranium on the actinide sequence of the periodic table They are very radioactive and have half-lives of tens of thousands of years That means they're ... 00:33: ... fire plants is also higher due to the traced but completely uncontained radioactive products of coal burning But the most compelling attraction is that nuclear power ...
	2019-06-17: How Black Holes Kill Galaxies 12:26: On the other hand, the presence of highly radioactive stuff with very short half-lives is a telltale sign of recent merger. 12:39: ... a silly mistake I said that the half-life is the average decay time of a radioactive element It's ... 12:26: On the other hand, the presence of highly radioactive stuff with very short half-lives is a telltale sign of recent merger. 12:39: ... a silly mistake I said that the half-life is the average decay time of a radioactive element It's ... 12:26: On the other hand, the presence of highly radioactive stuff with very short half-lives is a telltale sign of recent merger.
	2019-06-06: The Alchemy of Neutron Star Collisions 02:47: ... nuclei produced in the r-process are unstable these isotopes undergo radioactive decay into lighter elements after being created in a neutron star ...
	2019-05-16: The Cosmic Dark Ages 05:45: ... cold hydrogen gas flips its spin direction it either absorbs or emits a radio photon with a wavelength of 21cm. When the first stars ignited they ... 12:02: ... cosmic dark ages themselves using new generations of extremely sensitive radio telescope to catch more of those elusive 21cm ... 05:45: ... cold hydrogen gas flips its spin direction it either absorbs or emits a radio photon with a wavelength of 21cm. When the first stars ignited they heated the ... 12:02: ... cosmic dark ages themselves using new generations of extremely sensitive radio telescope to catch more of those elusive 21cm ...
	2019-05-09: Why Quantum Computing Requires Quantum Cryptography 15:41: Munrais asks whether putting radio telescopes around the sun would improve the resolution of an interferometer.
	2019-05-01: The Real Science of the EHT Black Hole 03:50: ... this resolution is around 1mm, which is around the shortest wavelength radio ... 04:24: ... Event horizon Telescope - the EHT - consists of nine radio observatories across the globe, from the south pole to Greenland - and ... 07:43: Remember that the EHT observes radio light with a wavelength of around a millimeter. 03:50: ... this resolution is around 1mm, which is around the shortest wavelength radio light. ... 07:43: Remember that the EHT observes radio light with a wavelength of around a millimeter. 04:24: ... Event horizon Telescope - the EHT - consists of nine radio observatories across the globe, from the south pole to Greenland - and the number is ...
	2019-02-20: Secrets of the Cosmic Microwave Background 00:08: ... static buzz your hear is mostly due to the ambient radio produced by our noisy pre-galactic Civilization But Around 1% of that ... 12:34: ... faint noisy buzz So next time you hear the static of an untuned TV or radio remember that in that noise can be found the secrets of the earliest ... 00:08: ... static buzz your hear is mostly due to the ambient radio produced by our noisy pre-galactic Civilization But Around 1% of that buzz is ... 12:34: ... faint noisy buzz So next time you hear the static of an untuned TV or radio remember that in that noise can be found the secrets of the earliest epochs of ...
	2018-12-12: Quantum Physics in a Mirror Universe 00:02: ... the same way we tested this using the cobalt-60 atom the nucleus of this radioactive isotope of cobalt decays via the weak interaction into nickel by ...
	2018-12-06: Did Life on Earth Come from Space? 00:37: ... their star's own radiation and be ejected from the solar system this is Radio panspermia stars may be constantly spraying their germy life through the ...
	2018-11-14: Supersymmetric Particle Found? 04:40: In fact, it's a cosmic ray detector disguised as a neutrino detector disguised as a radio antenna disguised as a hot air balloon. 06:31: ANITA is a cluster of radio antennae that hovers 37 kilometers above Antarctica. 06:37: ... decays in the ice anywhere within 700 kilometers of ANITA, the resulting radio frequency Cherenkov can be seen by ANITA'S ... 06:55: That allows it to sort out neutrino radio flashes from the flashes produced by other cosmic rays coming in from above. 07:29: ... were a little confused when they spotted two extremely high energy radio bursts that could only have been produced by a high energy particle ... 09:23: This then causes a high energy radio flash coming from directly below. 04:40: In fact, it's a cosmic ray detector disguised as a neutrino detector disguised as a radio antenna disguised as a hot air balloon. 06:31: ANITA is a cluster of radio antennae that hovers 37 kilometers above Antarctica. 07:29: ... were a little confused when they spotted two extremely high energy radio bursts that could only have been produced by a high energy particle passing all ... 09:23: This then causes a high energy radio flash coming from directly below. 06:55: That allows it to sort out neutrino radio flashes from the flashes produced by other cosmic rays coming in from above. 06:37: ... decays in the ice anywhere within 700 kilometers of ANITA, the resulting radio frequency Cherenkov can be seen by ANITA'S ...
	2018-11-07: Why String Theory is Right 16:28: You have a box containing a vial of poison connected to a radioactive isotope that could either decay or not, releasing the poison.
	2018-10-31: Are Virtual Particles A New Layer of Reality? 13:54: ... about the behavior of aliens, saying things like the window of strong radio emission for any civilization is too short to overlap with us or aliens ...
	2018-10-25: Will We Ever Find Alien Life? 01:02: ... ways that an advanced civilization could give away their presence; radio transmissions, robotic probes, or star-blotting solar ... 03:10: We've been actively watching for radio transmissions from other worlds for half a century. 03:38: But radio transmissions may not be our most likely first encounter with ET. 07:23: ... factors like the fraction of intelligent life that transmits radio signals and how long that communicative civilization ... 01:02: ... ways that an advanced civilization could give away their presence; radio transmissions, robotic probes, or star-blotting solar ... 03:10: We've been actively watching for radio transmissions from other worlds for half a century. 03:38: But radio transmissions may not be our most likely first encounter with ET. 01:02: ... ways that an advanced civilization could give away their presence; radio transmissions, robotic probes, or star-blotting solar ...
	2018-10-10: Computing a Universe Simulation 13:10: That led to the radio emission arriving hours after the gravitational waves. 13:15: But that's radio, which can interact strongly with the rare charged electrons and protons in intergalactic space. 13:10: That led to the radio emission arriving hours after the gravitational waves.
	2018-09-12: How Much Information is in the Universe? 14:27: ... are more commonly used for radioactive elements, but can be used for anything that has a constant probability ...
	2018-08-30: Is There Life on Mars? 11:51: This is the same way we map the ocean, by analyzing radio waves reflected from layers below the surface. 06:20: In it a soil sample is fed nutrients laced with radioactive carbon-14. 06:26: Any microbes should metabolize the nutrients and expel radioactive CO2. 06:32: Right away, both probes detected these radioactive gases. 06:20: In it a soil sample is fed nutrients laced with radioactive carbon-14. 06:26: Any microbes should metabolize the nutrients and expel radioactive CO2. 06:32: Right away, both probes detected these radioactive gases. 06:20: In it a soil sample is fed nutrients laced with radioactive carbon-14. 06:26: Any microbes should metabolize the nutrients and expel radioactive CO2. 06:32: Right away, both probes detected these radioactive gases.
	2018-08-23: How Will the Universe End? 07:44: They slowly leak away their mass as a cool heat [INAUDIBLE] of random particles for the most part faint radio light.
	2018-08-01: How Close To The Sun Can Humanity Get? 04:08: Finally, it will detect radio waves from processes responsible for the acceleration of particles in the solar wind.
	2018-05-02: The Star at the End of Time 10:25: ... the Event Horizon Telescope has now detected radio emission from pretty close to the event horizon of Sag A*, which ...
	2018-04-18: Using Stars to See Gravitational Waves 05:59: The international pulsar timing array is a massive effort spanning many universities and radio observatories around the world.
	2018-03-28: The Andromeda-Milky Way Collision 09:25: ... Channel says, "If they detected this with current radio telescopes, I cannot imagine what they will discover with the square ... 09:40: ... EDGES experiment integrated for hundreds of days and added together the radio signal from the whole sky to measure their signal of the first ... 09:25: ... Channel says, "If they detected this with current radio telescopes, I cannot imagine what they will discover with the square kilometer ...
	2018-03-21: Scientists Have Detected the First Stars 01:42: That photon has a wavelength of 21 centimeters, which is radio light. 03:31: This is one of the most radio quiet locations on the planet, far from any human-made interference. 03:37: That's because is remote, not because Australians don't have radio yet, despite the rumors. 01:42: That photon has a wavelength of 21 centimeters, which is radio light. 03:31: This is one of the most radio quiet locations on the planet, far from any human-made interference. 03:26: Their edges experiment is part of the Murchison Radio-Astronomy Observatory in Western Australia.
	2017-11-29: Citizen Science + Zero-Point Challenge Answer 05:08: This all started with the City at Home program, which looks through radio data for signs of signals from intelligent life.
	2017-11-22: Suicide Space Robots 08:58: ... unlike the long silent Pioneer spacecraft, Voyager 1 still sends faint radio signals, bringing us our first and only direct measurements from beyond ...
	2017-10-04: When Quasars Collide STJC 01:12: ... by Preeti Kharb and Dharam Vir Lal from India's National Center for Radio Astrophysics, and David Merritt from the Rochester Institute of ... 03:59: ... short the target is observed with radio telescopes on opposite sides of the planet, and phase differences in the ... 04:12: In fact, the spatial resolution is equivalent to what you would get with a telescope equal in size to the separation of the radio antenna. 04:36: Here's the radio map at 15 gigahertz frequency. 04:47: So what we're actually seeing here is radio emission from jets. 05:15: The radio light seen here is from electrons spiraling in those magnetic fields, so-called synchrotron radiation. 05:27: ... frequently see separate knots of radio light in AGN jets, which can splatter as their fuel supply changes or as ... 06:02: Well, the researchers tested this by looking at multiple frequencies to get a crude radio spectrum. 06:14: Spiraling electrons produce radio waves a lots of frequencies all the way down to very low energies. 06:21: ... begins, we think the matter should be so dense that the lowest energy radio waves have trouble escaping the ... 09:38: Longer exposure radio observations will pin down the energy distribution to confirm whether these really are jets produced by two black holes. 04:12: In fact, the spatial resolution is equivalent to what you would get with a telescope equal in size to the separation of the radio antenna. 01:12: ... by Preeti Kharb and Dharam Vir Lal from India's National Center for Radio Astrophysics, and David Merritt from the Rochester Institute of ... 04:47: So what we're actually seeing here is radio emission from jets. 05:15: The radio light seen here is from electrons spiraling in those magnetic fields, so-called synchrotron radiation. 05:27: ... frequently see separate knots of radio light in AGN jets, which can splatter as their fuel supply changes or as the ... 04:36: Here's the radio map at 15 gigahertz frequency. 09:38: Longer exposure radio observations will pin down the energy distribution to confirm whether these really are jets produced by two black holes. 06:02: Well, the researchers tested this by looking at multiple frequencies to get a crude radio spectrum. 03:59: ... short the target is observed with radio telescopes on opposite sides of the planet, and phase differences in the incoming ... 06:14: Spiraling electrons produce radio waves a lots of frequencies all the way down to very low energies. 06:21: ... begins, we think the matter should be so dense that the lowest energy radio waves have trouble escaping the ...
	2017-08-24: First Detection of Life 00:47: ... measure the spectrum of Earth's atmosphere, take pictures, and look for radio emission during this brief flyby ... 06:26: Galileo even captured radio signatures from Earth. 00:47: ... measure the spectrum of Earth's atmosphere, take pictures, and look for radio emission during this brief flyby ... 06:26: Galileo even captured radio signatures from Earth.
	2017-08-16: Extraterrestrial Superstorms 08:10: ... carries eight instruments, including a radiometer for probing the atmospherics high-pressure depths, an imaging ...
	2017-05-03: Are We Living in an Ancestor Simulation? ft. Neil deGrasse Tyson 00:37: In fact, with its director Neil deGrasse Tyson, along with comedian Eugene Mirman, as part of Neil's "StarTalk" radio show. 03:07: You can check out more on "StarTalk" radio, link in the description. 12:20: If you want to see more of my chat with Neil deGrasse Tyson, head over to "StarTalk" radio, "Cosmic Queries," link below. 12:36: It gets pretty philosophical and mind bending, as is much of "StarTalk" radio, very highly recommended. 12:20: If you want to see more of my chat with Neil deGrasse Tyson, head over to "StarTalk" radio, "Cosmic Queries," link below. 03:07: You can check out more on "StarTalk" radio, link in the description. 13:48: In fact, this is why high radioactivity results in high cancer risk.
	2017-04-19: The Oh My God Particle 01:42: Radioactivity was discovered by Mary Curie and Henri Bacquerel at the end of the 1800s. 01:48: High energy particles, electrons, and small atomic nuclei, as well as gamma rays, are ejected when heavier radioactive elements decay. 01:55: We're bathed in a very low level of this radiation due to naturally occurring radioactive elements in the Earth. 02:02: ... after its discovery, this ambient radioactive flux was found to weaken with height above the ground, because the ... 01:48: High energy particles, electrons, and small atomic nuclei, as well as gamma rays, are ejected when heavier radioactive elements decay. 01:55: We're bathed in a very low level of this radiation due to naturally occurring radioactive elements in the Earth. 02:02: ... after its discovery, this ambient radioactive flux was found to weaken with height above the ground, because the ... 01:48: High energy particles, electrons, and small atomic nuclei, as well as gamma rays, are ejected when heavier radioactive elements decay. 01:55: We're bathed in a very low level of this radiation due to naturally occurring radioactive elements in the Earth. 01:48: High energy particles, electrons, and small atomic nuclei, as well as gamma rays, are ejected when heavier radioactive elements decay. 02:02: ... after its discovery, this ambient radioactive flux was found to weaken with height above the ground, because the radiation ... 01:42: Radioactivity was discovered by Mary Curie and Henri Bacquerel at the end of the 1800s.
	2017-03-29: How Time Becomes Space Inside a Black Hole 08:34: In fact though, it was emitted at larger radio than wherever we encounter it.
	2017-01-25: Why Quasars are so Awesome 01:19: Sometimes they even have jets of near light speed particles filling the surrounding universe with giant radio plumes. 01:49: When the very first radio telescopes pointed to the heavens, they saw fat blobs of radio light, whose sources were unknown. 01:57: ... blobs were only blobby because those early radio antennae had some pretty bad spatial resolution, making it difficult to ... 02:13: In an event known as an occultation, the moon passed right in front of one of the brightest of these radio blobs. 02:20: It was object number 273 in the brand new 3rd Cambridge Radio Catalog-- 3C273, for short. 02:30: ... Parkes radio telescope in Australia was trained on the occultation and registered the ... 02:38: That timing allowed astronomers to identify a tiny star-like point of bluish light as the source of the radio emission. 02:56: And so the name quasi stellar radio source was born. 05:34: ... through the galaxy and even filling intergalactic space with beautiful radio ... 05:45: We call these radio galaxies. 01:57: ... blobs were only blobby because those early radio antennae had some pretty bad spatial resolution, making it difficult to pinpoint ... 02:13: In an event known as an occultation, the moon passed right in front of one of the brightest of these radio blobs. 02:20: It was object number 273 in the brand new 3rd Cambridge Radio Catalog-- 3C273, for short. 02:38: That timing allowed astronomers to identify a tiny star-like point of bluish light as the source of the radio emission. 05:45: We call these radio galaxies. 01:49: When the very first radio telescopes pointed to the heavens, they saw fat blobs of radio light, whose sources were unknown. 01:19: Sometimes they even have jets of near light speed particles filling the surrounding universe with giant radio plumes. 05:34: ... through the galaxy and even filling intergalactic space with beautiful radio plumes. ... 02:30: ... was trained on the occultation and registered the exact instant that the radio signal vanished behind the ... 02:56: And so the name quasi stellar radio source was born. 02:30: ... Parkes radio telescope in Australia was trained on the occultation and registered the exact ... 01:49: When the very first radio telescopes pointed to the heavens, they saw fat blobs of radio light, whose sources were unknown.
	2017-01-11: The EM Drive: Fact or Fantasy? 09:56: So in our recent episode, we talked about whether alien civilizations could possibly detect us from radio transmissions. 10:05: Harlan Kempf asks whether a radio interferometer could be built across multiple planets and what would be the effect on resolution. 10:54: But I'm no radio astronomer, so there are probably enormous difficulties in actually achieving that. 11:09: SunPower Guru argues that SITI is pointless, because there's no good reason to think that aliens would use, for example, radio. 12:22: There's very good reason to think that aliens will use light, with a radio or otherwise. 12:28: Speaking of not using radio, Richy Rich and Gareth Dean had a nice discussion on whether aliens would use radio waves. 13:01: Radio is much better at that and so is the natural choice for reaching many listeners or if you don't know where your listener is. 13:16: Since the 1960s, our own radio leakiness has diminished, with narrowing broadcast frequency bands, fiberoptics, etc. 13:26: ... may be that an emerging civilisation's radio loud bubble is really a very thin shell, and so catching it could be ... 13:42: In that case, radio is still the way to go, and it's worthwhile for us to search at radio frequencies. 10:54: But I'm no radio astronomer, so there are probably enormous difficulties in actually achieving that. 13:42: In that case, radio is still the way to go, and it's worthwhile for us to search at radio frequencies. 10:05: Harlan Kempf asks whether a radio interferometer could be built across multiple planets and what would be the effect on resolution. 13:16: Since the 1960s, our own radio leakiness has diminished, with narrowing broadcast frequency bands, fiberoptics, etc. 13:26: ... may be that an emerging civilisation's radio loud bubble is really a very thin shell, and so catching it could be ... 12:28: Speaking of not using radio, Richy Rich and Gareth Dean had a nice discussion on whether aliens would use radio waves. 09:56: So in our recent episode, we talked about whether alien civilizations could possibly detect us from radio transmissions. 12:28: Speaking of not using radio, Richy Rich and Gareth Dean had a nice discussion on whether aliens would use radio waves. 01:23: ... White, et al., 2016 "Measurement of Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum." First, a bit of ...
	2017-01-04: How to See Black Holes + Kugelblitz Challenge Answer 02:59: It's a collaboration of currently nine and eventually 12 or more radio telescopes distributed across the planets.
	2016-12-21: Have They Seen Us? 00:00: ... PLAYING] A century of Earth's radio transmissions has now washed over thousands of other star systems, ... 00:31: ... planet, even from the nearest neighboring star, would have seen nothing, radio quietness until only around a century ... 00:42: ... sporadic buzz of the first experiments with wireless transmission, the radio brightness of this small planet would have bloomed into a continuous ... 01:13: And it carries with it the first transatlantic radio transmission of Marconi himself. 01:18: ... Olympics, episodes of the "Lone Ranger," and Orson Welles' ill-fated radio adaptation of "War of the Worlds." That shell has washed over several ... 02:44: ... peered into the so-called water hole, a narrow frequency range in the radio spectrum between a pair of H and OH emission spikes, which itself is ... 03:13: ... of SETI programs followed, utilizing several of the world's great radio telescopes, like Arecibo in Puerto Rico and the Parkes radio telescope ... 03:35: ... 1977 Wow! signal is the most compelling, a narrow-frequency radio blast detected in the water hole, that still has no broadly accepted ... 04:06: The radio leakage produced by their own internal broadcasts would be much harder to detect. 05:07: ... of the reasons it's hard to spot unintentional radio leakage is that a distant civilization's radio bubble is likely to ... 06:02: But there is a way to peer straight through our own radio noise as though it wasn't there. 06:10: Two radio telescopes separated by a large enough distance can filter out local transmissions. 07:00: Arrays of thousands of radio dishes will be built in Africa and hundreds of thousands of antenna installed in Australia. 07:07: When connected up, it'll effectively form a giant radio telescope, with over a square kilometer surface area. 07:33: One of its primary purposes will be to catch the radio emission from hydrogen gas in the extremely early universe. 07:49: But if such radio waves travel to us from the earliest of times, then they become stretched out as they travel through an expanding universe. 08:06: To spot these radio photons, we need a truly gigantic interferometer, both for extreme sensitivity and to eliminate our own radio buzz. 08:42: Loeb and Zaldarriga's numbers assume pointing SKA at a target star system for an entire month and adding up all of the radio emission over that time. 08:53: For an artificial radio source, that would look like emission over a narrow-frequency range that doesn't correspond to any natural process. 10:04: ... aliens would need a radio telescope trillions of times the SKA's surface area and equivalent to a ... 10:20: Although it's exceedingly unlikely that there's one of those within our radio bubble. 12:04: If there's a slightly more technologically advanced civilization within our radio bubble, they've probably seen us. 01:18: ... Olympics, episodes of the "Lone Ranger," and Orson Welles' ill-fated radio adaptation of "War of the Worlds." That shell has washed over several thousand star ... 03:35: ... 1977 Wow! signal is the most compelling, a narrow-frequency radio blast detected in the water hole, that still has no broadly accepted natural ... 00:42: ... sporadic buzz of the first experiments with wireless transmission, the radio brightness of this small planet would have bloomed into a continuous planet-wide ... 05:07: ... to spot unintentional radio leakage is that a distant civilization's radio bubble is likely to overlap in frequency with our own ... 10:20: Although it's exceedingly unlikely that there's one of those within our radio bubble. 12:04: If there's a slightly more technologically advanced civilization within our radio bubble, they've probably seen us. 08:06: To spot these radio photons, we need a truly gigantic interferometer, both for extreme sensitivity and to eliminate our own radio buzz. 07:00: Arrays of thousands of radio dishes will be built in Africa and hundreds of thousands of antenna installed in Australia. 07:33: One of its primary purposes will be to catch the radio emission from hydrogen gas in the extremely early universe. 08:42: Loeb and Zaldarriga's numbers assume pointing SKA at a target star system for an entire month and adding up all of the radio emission over that time. 04:06: The radio leakage produced by their own internal broadcasts would be much harder to detect. 05:07: ... of the reasons it's hard to spot unintentional radio leakage is that a distant civilization's radio bubble is likely to overlap in ... 04:06: The radio leakage produced by their own internal broadcasts would be much harder to detect. 06:02: But there is a way to peer straight through our own radio noise as though it wasn't there. 08:06: To spot these radio photons, we need a truly gigantic interferometer, both for extreme sensitivity and to eliminate our own radio buzz. 00:31: ... planet, even from the nearest neighboring star, would have seen nothing, radio quietness until only around a century ... 08:53: For an artificial radio source, that would look like emission over a narrow-frequency range that doesn't correspond to any natural process. 02:44: ... peered into the so-called water hole, a narrow frequency range in the radio spectrum between a pair of H and OH emission spikes, which itself is within the ... 03:13: ... great radio telescopes, like Arecibo in Puerto Rico and the Parkes radio telescope in ... 07:07: When connected up, it'll effectively form a giant radio telescope, with over a square kilometer surface area. 10:04: ... aliens would need a radio telescope trillions of times the SKA's surface area and equivalent to a dish ... 03:13: ... of SETI programs followed, utilizing several of the world's great radio telescopes, like Arecibo in Puerto Rico and the Parkes radio telescope in ... 06:10: Two radio telescopes separated by a large enough distance can filter out local transmissions. 01:13: And it carries with it the first transatlantic radio transmission of Marconi himself. 00:00: ... PLAYING] A century of Earth's radio transmissions has now washed over thousands of other star systems, carrying with it ... 07:49: But if such radio waves travel to us from the earliest of times, then they become stretched out as they travel through an expanding universe. 10:45: But remember, humanity is young as a radio-noisy civilization.
	2016-11-16: Strange Stars 07:40: ... years later, after some small technological advancements, we pointed our radio telescopes and then the orbiting Chandra X-ray Observatory to that spot ...
	2016-10-26: The Many Worlds of the Quantum Multiverse 02:40: A machine containing a radioactive element is set to shatter the flask in the event that the radioactive element decays. 02:51: That radioactive decay is a purely quantum process. 05:23: ... if the family of possible states extends beyond the radioactive decay, beyond the cat, and includes the observer and, indeed, the entire ... 05:33: ... it's because we're part of an entire quantum timeline in which the radioactive decay and subsequent poisoning never ... 02:40: A machine containing a radioactive element is set to shatter the flask in the event that the radioactive element decays. 02:51: That radioactive decay is a purely quantum process. 05:23: ... if the family of possible states extends beyond the radioactive decay, beyond the cat, and includes the observer and, indeed, the entire ... 05:33: ... it's because we're part of an entire quantum timeline in which the radioactive decay and subsequent poisoning never ... 02:51: That radioactive decay is a purely quantum process. 05:23: ... if the family of possible states extends beyond the radioactive decay, beyond the cat, and includes the observer and, indeed, the entire ... 05:33: ... it's because we're part of an entire quantum timeline in which the radioactive decay and subsequent poisoning never ... 02:40: A machine containing a radioactive element is set to shatter the flask in the event that the radioactive element decays.
	2016-10-05: Are We Alone? Galactic Civilization Challenge 01:23: And at the high end, there should be civilisations within 100 light years, which may have detected our own radio transmissions by now.
	2016-08-24: Should We Build a Dyson Sphere? 09:52: I guess it couldn't hurt to point some radio telescopes, to look for power leakage from the Kugelblitz swarm.
	2016-07-20: The Future of Gravitational Waves 05:41: ... tunnel out of the nucleus of a polonium-212 atom, causing the atom's radioactive ...
	2016-06-29: Nuclear Physics Challenge 00:46: This drives the alpha decay of radioactive elements. 00:52: But don't literally take it, because it's one of the most radioactive elements known, and it decays as alpha particles tunnel out of its nucleus. 01:02: It's so radioactive that it glows blue as these alpha particles ionize the air around it. 00:46: This drives the alpha decay of radioactive elements. 00:52: But don't literally take it, because it's one of the most radioactive elements known, and it decays as alpha particles tunnel out of its nucleus. 01:02: It's so radioactive that it glows blue as these alpha particles ionize the air around it. 00:46: This drives the alpha decay of radioactive elements. 00:52: But don't literally take it, because it's one of the most radioactive elements known, and it decays as alpha particles tunnel out of its nucleus.
	2016-06-01: Is Quantum Tunneling Faster than Light? 04:41: When it's an alpha particle escaping a nucleus, this is one of the most important mechanisms for radioactive decay.
	2016-05-18: Anti-gravity and the True Nature of Dark Energy 12:09: Well, the idea is to beam the data back with low-power lasers, or perhaps alternatively to use the sail itself as an antenna for radio transmission.
	2016-04-20: Why the Universe Needs Dark Energy 11:05: ... demand for bachelor's or masters physicists, like medical imaging or radiology, energy industries, meteorology, science education, science journalism, ...
	2016-03-30: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners! 00:13: Fast radio bursts are an example of that. 00:16: Until recently, we had no idea what the sudden flashes of radio emission coming from mysterious events out there in the universe really were. 00:30: So an FRB is seen as a very quick flash of broad frequency radio emission from some spot on the sky. 01:30: A fast radio burst repeated itself. 02:14: But now that we know that fast radio bursts can repeat, we're sure to catch one in the act and puzzle this one out before too long. 01:30: A fast radio burst repeated itself. 00:13: Fast radio bursts are an example of that. 02:14: But now that we know that fast radio bursts can repeat, we're sure to catch one in the act and puzzle this one out before too long. 00:16: Until recently, we had no idea what the sudden flashes of radio emission coming from mysterious events out there in the universe really were. 00:30: So an FRB is seen as a very quick flash of broad frequency radio emission from some spot on the sky. 00:16: Until recently, we had no idea what the sudden flashes of radio emission coming from mysterious events out there in the universe really were.
	2016-02-11: LIGO's First Detection of Gravitational Waves! 05:55: ... using multiple telescopes that span the electromagnetic spectrum from radio to visible to ...
	2015-10-28: Is The Alcubierre Warp Drive Possible? 09:33: Radio telescopes are now pointed at it.
	2015-08-27: Watch THIS! (New Host + Challenge Winners) 04:07: And the effective potential formulation for radio [INAUDIBLE].
	2015-06-24: The Calendar, Australia & White Christmas 06:16: ... McLean asked, "if aliens can't pick up our radio waves, then why are we trying to listen for alien radio waves with ...
	2015-06-17: How to Signal Aliens 00:49: Let's start with the radio. 00:50: ... misconception, it could be very difficult for aliens to pick up the radio and TV transmissions that we've been leaking into space since around ... 00:58: ... growing consensus is that, even if nearby aliens have space-based radio receivers with the total area equivalent to a large city pointed right ... 01:13: So what would it take to have a radio beacon that operated fairly continuously and could be detected? 01:27: ... they suggested that the optimal solution would be a phased array of many radio telescopes sending narrow pulses of high-powered microwaves at ... 03:06: But as with radio, the continuous energy usage would be very expensive. 05:55: ... besides looking for radio signals and laser pulses, which SETI does now, should SETI also be ... 01:13: So what would it take to have a radio beacon that operated fairly continuously and could be detected? 00:58: ... growing consensus is that, even if nearby aliens have space-based radio receivers with the total area equivalent to a large city pointed right at Earth ... 05:55: ... besides looking for radio signals and laser pulses, which SETI does now, should SETI also be looking for ... 01:27: ... they suggested that the optimal solution would be a phased array of many radio telescopes sending narrow pulses of high-powered microwaves at frequencies of 10 ...
	2015-04-01: Is the Moon in Majora’s Mask a Black Hole? 08:14: Tharks asks whether given enough time, the CMB will eventually redshift into the FM radio band.
	2015-02-25: How Do You Measure the Size of the Universe? 03:22: In more extreme cases, the wavelength can be stretched out of the visible spectrum altogether, into microwaves or radio waves.
	2015-02-18: Is It Irrational to Believe in Aliens? 01:19: The details are different, since Drake, the founder of SETI, was estimating the number of detectable alien radio signals. 04:17: ... one other such species that's jetted around the cosmos, something like radio signals, space station probes, a broken down Millenium Falcon, I don't ... 01:19: The details are different, since Drake, the founder of SETI, was estimating the number of detectable alien radio signals. 04:17: ... one other such species that's jetted around the cosmos, something like radio signals, space station probes, a broken down Millenium Falcon, I don't know, an ...

87 result(s) shown.

Help · About · Index