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2022-10-12: The REAL Possibility of Mapping Alien Planets!
- 06:05: ... orbital radius. Around 550 “astronomical units” or “AUs” in astronomer-speak. For comparison, Voyager 1 is our most distant probe. It’s ...
- 07:45: ... the destination during the working lifetime of at least some of the astronomers and engineers who witness the launch we need a travel time of 25-30 ...
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2022-09-21: Science of the James Webb Telescope Explained!
- 00:07: But why should astronomers have all the fun?
- 01:26: You don’t have to be employed by NASA, or a US citizen, or even a professional astronomer.
- 09:03: Many astronomers did a lot of science with this one image.
- 10:33: OK, so that’s a primer on what JWST can do and how astronomers use it.
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2022-05-25: The Evolution of the Modern Milky Way Galaxy
- 00:00: ... Desert in Chile. I was traveling with a much more experienced astronomer from Europe, but it was also his first time in the southern ...
- 06:32: ... has told us so far. A lot, actually. For example, astronomers have identified the last truly gigantic merger that happened to ...
- 06:57: ... enables the telescope to detect tiny motions, which in turn allows astronomers to reconstruct detailed orbits of Milky Way stars. The stars ...
- 10:12: ... the littlest ones are still close together so it’s easy for astronomers to pick out the little stripe of stars, like GD-1: a globular ...
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2022-05-18: What If the Galactic Habitable Zone LIMITS Intelligent Life?
- 02:06: ... a modern astronomer’s perspective, our Sun is objectively mediocre, average ...
- 05:52: ... content of a cloud or a star. It comes from the fact that astronomers tend to call any element heavier than helium a metal. On the ...
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2022-04-20: Does the Universe Create Itself?
- 10:30: ... other side of the U. An eyeball here symbolizes the observer. All the astronomers with their telescopes and observatories are aimed back at the Big ...
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2022-03-23: Where Is The Center of The Universe?
- 00:37: Ever since then, astronomers have embraced the Copernican principle, which states that we are NOT in a special place in the universe.
- 18:31: ... astronomer Sofia Sheikh found around 60 similar signals that were not clearly ...
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2022-03-08: Is the Proxima System Our Best Hope For Another Earth?
- 01:28: ... telescope thing improved over the next century and a half, allowing astronomers to watch alpha-cen sway relative to the background stars as Earth ...
- 03:50: In 2016, Spanish astronomer Guillem Anglada-Escudé and the Pale Red Dot team figured it out: Proxima had a planet.
- 06:50: ... between exoplanet and star combined with the speed of the wobble, astronomers could calculate its ...
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2022-02-10: The Nature of Space and Time AMA
- 00:03: ... in a sense uh that's a that's a pretty valid way to think about now astronomers don't like to think about the expansion of the universe as of objects ...
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2022-01-19: How To Build The Universe in a Computer
- 01:26: ... 1941 the Swedish astronomer Erik Holmberg conducted what was probably the first simulation of ...
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2021-12-29: How to Find ALIEN Dyson Spheres
- 09:46: ... Jugaku and Shiro Nishimura, Japanese astronomers who’ve been searching for Dyson spheres for years, calculate that a ...
- 10:01: ... search has expanded massively. One of the latest efforts led by Swedish astronomer Erik Zackrisson looked at over 200,000 of the stars in the gigantic ...
- 12:33: ... this possibility in mind, a team led by Penn State astronomer Jason Write used the WISE survey to look for galaxies that had too much ...
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2021-12-20: What Happens If A Black Hole Hits Earth?
- 02:27: ... supermassive black holes in the centers of galaxies. Over the decades, astronomers and cosmologists have managed to systematically rule out most of the ...
- 03:25: ... distant stars strongly enough to easily spot them. But fortunately for astronomers, and perhaps less fortunate for everyone else - if dark matter really is ...
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2021-12-10: 2021 End of Year AMA!
- 00:02: ... to win control of the show [Music] long story short every single astronomer in the world was inspired by carl sagan and thinks that the duty of ...
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2021-11-10: What If Our Understanding of Gravity Is Wrong?
- 01:39: ... for nearly as long as astronomers have been hunting for dark matter, others have been hunting for an ...
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2021-09-15: Neutron Stars: The Most Extreme Objects in the Universe
- 10:06: ... of the neutron star’s rotation- and gravitational wave astronomers are searching for these signals with LIGO right now, ...
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2021-09-07: First Detection of Light from Behind a Black Hole
- 00:07: Our cleverest astronomers have figured out ways to catch light that skims the very edge of black holes.
- 01:59: ... telescope - it can be done with a single, ordinary scope, and one astronomer with lots of ...
- 05:46: ... of the quasar spectrum, and one that confused the hell out of the astronomers who first saw ...
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2021-08-03: How An Extreme New Star Could Change All Cosmology
- 00:47: ... that go bump in the night - astrophysical objects that vary over time. Astronomers using the ZTF caught a white dwarf that, at first glance, looked ...
- 02:51: ... so the mystery deepens. At this point, astronomers decided that the object was weird enough to bring some serious firepower ...
- 03:58: ... telescope cameras see them as single points of light. But astronomers have a clever trick. If you know how much light a star is churning out - ...
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2021-07-21: How Magnetism Shapes The Universe
- 05:51: Fortunately astronomers are also tricky, and so have tricks.
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2021-05-11: How To Know If It's Aliens
- 05:11: ... brings us to Venus. In September 2020 Astronomers reported the signature of phosphine in the upper atmosphere of Venus ...
- 09:58: ... a pair of comets were in the radio beam at the time, but the Ohio State astronomers insist that those comets were not in the beam at all. No other ...
- 13:52: ... to reveal to you the true secrets of all those alien communications that astronomers have been hiding from the public for years. We'll then introduce some ...
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2021-03-16: The NEW Crisis in Cosmology
- 01:16: ... throwing galaxies apart from each other. We’ve talked about how astronomers first figured this out. Long story short - when a distant galaxy’s ...
- 03:13: ... beyond a certain distance. In the 1990s two teams of astronomers employed a new type of standard candle - the incredibly ...
- 04:42: ... different teams of astronomers pursued both approaches - and this is where the crisis ...
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2021-02-24: Does Time Cause Gravity?
- 07:48: But light DOES bend in a gravitational field - astronomers see it happening all the time in the effect we call gravitational lensing.
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2020-10-27: How The Penrose Singularity Theorem Predicts The End of Space Time
- 00:00: ... holes. Generally speaking. Specifically it was shared by the astronomers who revealed to us the Milky Way’s central black hole and by ...
- 12:11: ... stars in the galactic core. The work of Ghez and Genzel and other astronomers have guaranteed the existence of black holes, which means their are ...
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2020-09-01: How Do We Know What Stars Are Made Of?
- 01:13: And a lot of it was thanks to a brilliant young astronomer named Cecilia Payne.
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2020-08-17: How Stars Destroy Each Other
- 01:39: There, the royal astronomers of King Sejong’s court in Korea recorded a new point of light in the constellation of Wei, in what we call Scorpius.
- 02:28: ... our newfangled giant telescopes at the same spot where the royal Korean astronomers saw their guest star … you see ...
- 03:57: That placed it exactly where those royal astronomers saw their classical nova.
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2020-06-15: What Happens After the Universe Ends?
- 15:01: ... of the next Universe to continue your glory and to seriously confuse the astronomers of the next ...
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2020-05-11: How Luminiferous Aether Led to Relativity
- 13:52: ... week we explored how it is that astronomers could possibly calculate the age of the universe, given that we don't ...
- 16:48: ... character. The funny thing is, Slipher wasn't even some fancy European astronomer. He was from Indiana. His brother's name was Earl. I'd say that maybe ...
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2020-05-04: How We Know The Universe is Ancient
- 00:17: ... see the same constellations on the night sky as did our astronomer ancestors. Familiar star-maps are recorded in cave paintings tens of ...
- 01:35: ... the beginning of the 20th century, astronomers were arguing about the nature of these faint, fuzzy patches of light on ...
- 03:24: ... once been in an extremely hot, dense state, and expanded from there. Astronomers call this the big bang model of the universe. Now the name “big bang” ...
- 06:22: ... In the near-century since Edwin Hubble’s great discovery, thousands of astronomers have devoted their lives to measuring the Hubble constant - and a big ...
- 07:07: ... when astronomers did this calculation in the early 1930s, they figured that the universe ...
- 08:58: ... the next step in improving this number, I need to explain another method astronomers had been using to get distances to galaxies, and so calculate the Hubble ...
- 09:39: ... astronomers had originally made an awkward mistake - they had been counting bright ...
- 11:07: ... on the whole universe. It was in an attempt to do the latter that astronomers discovered the anti-gravitational effect of dark energy, and had to ...
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2020-04-14: Was the Milky Way a Quasar?
- 02:19: ... start in 2010, when a team of astronomers from the Harvard-Smithsonian Centre for Astrophysics were using the ...
- 02:33: ... astronomers believe that when dark matter particles crash into and annihilate each ...
- 06:36: Believe it or not, it’s not so uncommon for astronomers to witness storms of supernova explosions raging across a galaxy.
- 10:51: ... a result published last year in Nature, a team of astronomers using South Africa’s MeerKAT telescope array discovered a handful of ...
- 11:25: ... 1400 light years above and below the plane of the Galaxy — leading astronomers to believe that they might be younger, more recent versions of the ...
- 12:47: ... a paper posted last month, a team of astronomers presented evidence that the X-ray activity of our central black hole has ...
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2020-04-07: How We Know The Earth Is Ancient
- 04:32: ... that earth was just one planet among several in our solar system. Astronomers now swear by the Copernican principle - Earth is not in a privileged ...
- 10:35: ... old, based on his radiometric dating. This was around the same time that astronomers proved that Immanuel Kant’s Island Universes were indeed other galaxies, ...
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2019-12-09: The Doomsday Argument
- 03:31: ... his estimate of the cosmological constant to be the value that most astronomers across the multiverse would observe, with a few assumptions like that ...
- 08:39: ... case the question was “what sort of cosmological constant is the typical astronomer likely to observe - so reference class was an astronomer - or really any ...
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2019-11-11: Does Life Need a Multiverse to Exist?
- 08:45: ... existence of dark energy was discovered in the 90s as astronomers tried to measure the expansion rate of the universe, only to find that ...
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2019-10-07: Black Hole Harmonics
- 11:42: LIGO has a publicly available alert system so that astronomers can follow up gravitational wave detections with other telescopes.
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2019-09-30: How Many Universes Are There?
- 15:37: ... it should have been planetary scientists that made this decision, not astronomers. ...
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2019-09-23: Is Pluto a Planet?
- 00:56: Astronomers are all about space taxonomy.
- 01:36: If you were an ancient astronomer like say, Ptolemy, the planets were the asteres planetai, the wandering stars.
- 03:52: But astronomers kept finding more and more objects in that vicinity, and eventually realized that a new group was needed in our taxonomy.
- 05:00: ... Planet X became the grail quest of Percival Lowell, businessman turned astronomer. He built the Lowell Observatory in Arizona with that single ...
- 05:48: ... Astronomer’s were expecting a planet - and one was found roughly where they thought ...
- 06:15: By 1931, astronomers had figured out that there didn’t need to be a ninth planet to account for Uranus’s strange orbit.
- 08:35: And so, despite the anger of schoolchildren everywhere, it was in their own interests that astronomers decided to act.
- 13:33: Maybe at some point in the future, as we learn more about how different worlds form, astronomers will change the definition of planet again.
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2019-08-19: What Happened Before the Big Bang?
- 10:47: Lemaitre was a Jesuit priest and astronomer physicist.
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2019-07-25: Deciphering The Vast Scale of the Universe
- 02:05: ... 1915, the American astronomer Vesto Slipher reported that some of those fuzzy blobs were zipping away ...
- 03:34: Not likely – at least not until the brilliant work of astronomer Henrietta Leavitt.
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2019-06-20: The Quasar from The Beginning of Time
- 00:40: ... 4,200 meters, the oxygen up here is 60% sea level, but astronomers deal with it because it is the premier astronomical observing site in ...
- 00:53: To Hawaiians it is a sacred site. And to astronomers, it's where the Earth meets the universe.
- 01:38: ... here to talk about a very special observation. In the spring of 2017, astronomers turned Gemini's great mirror towards the constellation of Boötes, the ...
- 01:50: ... of light that had been noticed in one of our great surveys of the sky. Astronomers guessed the speck was a quasar - a vortex of radiant matter falling into ...
- 02:06: ... was strange about this one was its distance. Its light was SO red that astronomers realized that that light must have been stretched out – redshifted – by ...
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2019-06-17: How Black Holes Kill Galaxies
- 07:21: ... in killing star formation they are accomplices to the crime but many astronomers think Supermassive Black holes are the main suspect here's one final ...
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2019-04-24: No Dark Matter = Proof of Dark Matter?
- 00:03: ... unseen origin was holding them together since the 1970s generations of astronomers have searched for the origin of dark matter gradually ruling out the ...
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2019-04-03: The Edge of an Infinite Universe
- 03:00: In general relativity we call a universe with this geometry de Sitter space, after Dutch astronomer Willem de Sitter.
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2019-03-20: Is Dark Energy Getting Stronger?
- 01:34: Back in the late 90s two teams of astronomers accidentally discovered dark energy.
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2019-03-06: The Impossibility of Perpetual Motion Machines
- 13:33: Francois Lacombe asks how astronomers distinguish the very small temperature differences in the CMB from the rest of the microwave noise.
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2019-01-24: The Crisis in Cosmology
- 00:07: ...has consumed astronomers for generations.
- 01:37: ...of thousands of astronomers across the generations.
- 04:59: ...astronomers were using these supernovae to better nail down the Hubble constant.
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2019-01-09: Are Dark Matter And Dark Energy The Same?
- 00:03: Astronomers are the worst at naming things.
- 00:10: But perhaps one astronomer has just fixed it, with a theory that says perhaps actually they are they same stuff.
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2018-12-06: Did Life on Earth Come from Space?
- 00:37: ... the interstellar space rock boom or more and the proposition by some astronomers that it may be an alien light sail I laid out the case why this is very ...
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2018-10-25: Will We Ever Find Alien Life?
- 05:33: A team of astronomers scoured the GAIA data looking for stars that were unusually faint for their stellar type.
- 07:05: Give astronomers data and they will write papers.
- 08:12: Astronomers Adam Frank and W.T. Sullivan did this in 2015.
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2018-10-03: How to Detect Extra Dimensions
- 05:48: But you restrict all the other stuff in the universe-- matter, radiation, astronomers-- to only three spatial dimensions.
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2018-08-30: Is There Life on Mars?
- 03:00: Astronomer Giacomo Maraldi quickly followed Huygens and in the early-18th century discovered ice caps on both poles, correctly inferring their nature.
- 03:27: ... Herschel was a fantastic astronomer, but his wrongness about Mars's atmosphere is a nice example that even ...
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2018-08-01: How Close To The Sun Can Humanity Get?
- 02:07: ... coronal mass ejection, dubbed the Carrington Event, after British astronomer Richard Carrington who observed ...
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2018-05-09: How Gaia Changed Astronomy Forever
- 05:34: ... Astronomers have already found evidence in the Gaia data that our galaxy was ...
- 09:00: Astronomers are not the most imaginative at namings stuff.
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2018-03-28: The Andromeda-Milky Way Collision
- 03:09: Those velocities were found by another astronomer, Vesto Slipher, by measuring Doppler shifts of spectral lines.
- 08:56: Astronomers in the distant future will see only a single featureless orb in the sky, and the next nearest galaxies will be very far and fast receding.
- 09:06: Will those astronomers ever figure out that there are countless other island universes stretching across a much vaster space time?
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2018-02-14: What is Energy?
- 14:02: ... Elytron points out the ridiculousness of astronomers calling all elements heavier than helium a metal, because technically, ...
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2018-01-31: Kronos: Devourer Of Worlds
- 04:04: In astro-speak, they tell us the star's metallicity, although for an astronomer, anything heavier than helium is called a metal.
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2017-12-13: The Origin of 'Oumuamua, Our First Interstellar Visitor
- 00:29: On October 19th this year, astronomers spotted an unusual object moving rapidly away from the sun.
- 02:19: And astronomers realized that this is consistent with an elongated body with a tumbling motion.
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2017-11-29: Citizen Science + Zero-Point Challenge Answer
- 00:15: [MUSIC PLAYING] The professional astronomer or astrophysicist is a pretty recent phenomenon.
- 00:33: ... trade, a classically trained musician, but as an amateur astronomer, he discovered Uranus and was the first to observe binary star systems, ...
- 01:26: Comets, in particular, are often discovered by amateur astronomers.
- 01:29: ... comet Hale-Bopp and Shoemaker-Levy 9, were co-discovered by amateur astronomers Thomas Bopp and Carolyn ...
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2017-11-02: The Vacuum Catastrophe
- 07:09: ... the late '90s, astronomers discovered that the expansion of the universe is, in fact, accelerating ...
- 08:38: ... out their zero point energies, at least enough of them to allow life and astronomers to ...
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2017-10-25: The Missing Mass Mystery
- 00:00: [MUSIC PLAYING] For years, astronomers have been unable to find up to half of the matter in the universe.
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2017-10-04: When Quasars Collide STJC
- 00:29: We may be about to find out, because astronomers report spotting a pair of them in a close binary orbit for the very first time.
- 10:08: ... finding will inspire astronomers to search for more of these dazzling giants, leading us closer to ...
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2017-09-13: Neutron Stars Collide in New LIGO Signal?
- 05:59: It was started by a tweet from astronomer J Craig Wheeler about a LIGO detection with an optical counterpart.
- 07:43: Astronomers don't trigger Hubble observations lightly.
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2017-08-30: White Holes
- 00:50: ... Astronomers have since demonstrated that black holes are very real with convincing ...
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2017-08-10: The One-Electron Universe
- 12:24: M. Paulson poked fun at astronomers for using "dark" to describe anything they don't understand-- dark matter, dark energy, dark flow.
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2017-08-02: Dark Flow
- 04:11: This allows astronomers to find extremely distant galaxy clusters just by studying the CMB.
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2017-06-07: Supervoids vs Colliding Universes!
- 13:39: Astronomers, right?
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2017-05-31: The Fate of the First Stars
- 01:19: Astronomers categorize stars according to the relative quantity of heavy elements that they possess.
- 01:25: By the way, astronomers call any element heavier than helium a metal.
- 02:51: Astronomers have been searching for the mythical pop three generation for decades.
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2017-04-05: Telescopes on the Moon
- 08:56: The moon with its thin atmosphere, stable surface, and long nights is an astronomer's dream.
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2017-01-25: Why Quasars are so Awesome
- 02:09: Then, in 1962, astronomers caught a break.
- 02:38: That timing allowed astronomers to identify a tiny star-like point of bluish light as the source of the radio emission.
- 02:46: Astronomers turned their optical telescopes on this strange star, and split the light into a spectrum.
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2017-01-11: The EM Drive: Fact or Fantasy?
- 10:54: But I'm no radio astronomer, so there are probably enormous difficulties in actually achieving that.
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2016-12-21: Have They Seen Us?
- 02:31: ... best astronomers have been engaged in the search for extraterrestrial intelligence, SETI, ...
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2016-11-16: Strange Stars
- 07:32: In the year 1181, Chinese and Japanese astronomers recorded a new star in the constellation of Cassiopeia.
- 08:00: ... pulsar in the Crab Nebula was also observed as a supernova by Chinese astronomers in 1054, except something was weird in the case of ...
- 09:17: ... dying star shouldn't have been massive enough to leave a black hole, yet astronomers still haven't found the expected neutron star at the location of the ...
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2016-11-09: Did Dark Energy Just Disappear?
- 00:21: ... in 1998 two independent teams of astronomers made an extremely controversial announcement: that the universe is not ...
- 00:37: These exploding white dwarf stars have predictable brightnesses that allow astronomers to figure out how far away they are.
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2016-06-15: The Strange Universe of Gravitational Lensing
- 01:57: ... British astrophysicist, Sir Arthur Eddington, loaded a ship full of astronomers and set sail for the island of Principe off the West coast of Africa and ...
- 07:36: Despite Einstein's pessimism, gravitational lensing has become an important staple in the astronomer's toolkit.
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2016-05-11: The Cosmic Conspiracy of Dark Energy Challenge Question
- 03:28: Close enough to 50-50 for an astronomer.
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2016-05-04: Will Starshot's Insterstellar Journey Succeed?
- 07:50: ... advisory team includes legendary engineer Freeman Dyson, the UK astronomer royal, Martin Rees, dark energy Nobel Laureate, Saul Perlmutter, and ...
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2016-04-27: What Does Dark Energy Really Do?
- 06:03: ... separate teams of astronomers spent years catching white dwarf supernovae exploding in galaxies ...
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2016-04-20: Why the Universe Needs Dark Energy
- 01:26: ... weighing up all of the matter in the universe, astronomers have figured out that there just isn't enough of anything to turn the ...
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2016-04-13: Will the Universe Expand Forever?
- 07:36: Astronomers worked for decades to weigh up the galaxies across vast swaths of the universe, including their dark matter.
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2016-03-30: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners!
- 00:48: It was only recently, April 2015, that astronomers finally pinpointed a galaxy that an FRB came from.
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2015-11-18: 5 Ways to Stop a Killer Asteroid
- 02:58: ... Astronomers around the world have worked together as part of the Spaceguard Program ...
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2015-09-23: Does Dark Matter BREAK Physics?
- 03:00: Astronomers spent years counting MACHOs this way.
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2015-08-05: What Physics Teachers Get Wrong About Tides!
- 01:33: Something much more subtle is happening that even many professional astronomers and physicists misunderstand-- including me, for many years.
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2015-06-17: How to Signal Aliens
- 03:28: ... something like NASA's Kepler satellite, astronomers stare at 150,000 or so stars at once continually for a few years, ...
- 04:00: With a few Kerbal Keplers, the Kerbal astronomers could look at hundreds of thousands or millions of stars at once.
- 04:14: ... Kepler was even launched, French astronomer Luke Arnold wrote a paper-- link below-- showing that the transits of ...
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2015-06-03: Is Gravity An Illusion?
- 10:46: ... just like the Hubble telescope, has to be shared with lots of other astronomers who aren't looking at ...
- 11:04: But remember, astronomers have other reasons for studying exoplanets-- just basic science.
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2015-05-27: Habitable Exoplanets Debunked!
- 00:48: It's not that the press or astronomers are lying.
- 00:50: ... people imagine when they hear the phrase "habitable world," and what astronomers mean by that same ...
- 00:57: To astronomers, the phrase "habitable exoplanet" just means exoplanet that lies in the habitable zone of its host star.
- 02:39: ... that star, then based on how much light gets blocked and for how long, astronomers were able to infer the radius of the planet and some features of its ...
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2015-03-11: What Will Destroy Planet Earth?
- 04:38: Astronomers have gone back and forth on the answer.
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2015-02-25: How Do You Measure the Size of the Universe?
- 01:11: But it's even crazier that astronomers think they know that number.
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2015-02-11: What Planet Is Super Mario World?
- 04:52: ... to planets outside the solar system are trickier, because astronomers don't have good estimates of both mass and radius for most ...
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