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	2022-11-23: How To See Black Holes By Catching Neutrinos 07:49: ... constellation of cetus includes a lot of Milky Way stars, a lot of very distant galaxies, but there’s only one thing that is a plausible source of ...
	2022-10-26: Why Did Quantum Entanglement Win the Nobel Prize in Physics? 15:49: There was the one about using the Sun’s gravitational field as a lens to take pictures of distant planets.
	2022-10-12: The REAL Possibility of Mapping Alien Planets! 04:36: ... field that would   create an Einstein ring of any distant object - including an exoplanet - as long as you were   ... 12:52: ... be able to do this for many exoplanets.  And, actually, for distant galaxies and   black holes and literally anything else ... 14:06: ... our lifetimes we may have mapped in detail   the surfaces of distant worlds, brought into focus by our own Sun and its lens of curved ... 12:52: ... be able to do this for many exoplanets.  And, actually, for distant galaxies and   black holes and literally anything else for  which ... 04:36: ... field that would   create an Einstein ring of any distant object - including an exoplanet - as long as you were   watching from ... 14:06: ... our lifetimes we may have mapped in detail   the surfaces of distant worlds, brought into focus by our own Sun and its lens of curved ... 04:36: ... pretty messy. For   example, here are some simulations of distant galaxies that have been lensed by a second galaxy   much closer to us. ... 06:05: ... in astronomer-speak.   For comparison, Voyager 1 is our most distant probe. It’s been traveling for 45 years and is   now around 150 ...
	2022-09-21: Science of the James Webb Telescope Explained! 00:19: ... galaxies to planets and exoplanet atmospheres to the earliest, most distant galaxies ever ... 09:36: These arcs are much more distant galaxies whose light is warped by the gravitational field of the cluster. 00:19: ... galaxies to planets and exoplanet atmospheres to the earliest, most distant galaxies ever ... 09:36: These arcs are much more distant galaxies whose light is warped by the gravitational field of the cluster.
	2022-07-20: What If We Live in a Superdeterministic Universe? 12:29: Their first effort used the light from a pair of distant stars as proxies for Alice and Bob. 13:12: The same team followed up with a cosmic Bell test using rather more distant objects - quasars several billion light years away. 12:29: Their first effort used the light from a pair of distant stars as proxies for Alice and Bob.
	2022-06-30: Could We Decode Alien Physics? 00:00: ... the perhaps not too distant future, every radio telescope on Earth receives the same massive ...
	2022-06-22: Is Interstellar Travel Impossible? 03:14: Some of these may be achievable in the distant but foreseeable future. 10:30: Moderate shielding is sufficient for nearby stars, and the ability to repair shielding might get us to more distant parts of the galaxy. 14:02: ... enough. Not hard enough to stop us from stretching our species’ reach to distant tracts of interstellar space ... 10:30: Moderate shielding is sufficient for nearby stars, and the ability to repair shielding might get us to more distant parts of the galaxy. 14:02: ... enough. Not hard enough to stop us from stretching our species’ reach to distant tracts of interstellar space ...
	2022-05-25: The Evolution of the Modern Milky Way Galaxy 03:22: ... are too small to see at those great distances.   The most distant galaxy known as of the filming  of this episode was discovered only ...
	2022-05-18: What If the Galactic Habitable Zone LIMITS Intelligent Life? 02:20: ... our distant ancestors, the Sun  was a wondrous source of warmth,   ...
	2022-05-04: Space DOES NOT Expand Everywhere 00:19: ... together to reveal the universe is expanding on the largest scales. The distant galaxies are all racing away from us, and interpreted through the lens ... 01:24: ... local motion or “peculiar velocity” is small compared to the fact that distant points are moving apart - receding - and the further distant the faster ... 07:58: ... that separation as the ring expands. So on our expanding cone, we see distant gridlines diverging, but nearby lines in a gravitational field remain ... 08:34: ... only evidence of the greater expansion comes from the receding view of distant ... 00:19: ... together to reveal the universe is expanding on the largest scales. The distant galaxies are all racing away from us, and interpreted through the lens of ... 08:34: ... only evidence of the greater expansion comes from the receding view of distant galaxies. ... 07:58: ... that separation as the ring expands. So on our expanding cone, we see distant gridlines diverging, but nearby lines in a gravitational field remain ... 01:24: ... local motion or “peculiar velocity” is small compared to the fact that distant points are moving apart - receding - and the further distant the faster the ...
	2022-03-30: Could The Universe Be Inside A Black Hole? 01:49: ... space is expanding evenly everywhere, then there are distant regions of the universe that are being propelled away from us faster ...
	2022-03-23: Where Is The Center of The Universe? 01:46: Thanks to Edwin Hubble, we know that distant galaxies are racing away from us - and the further we look, the faster they’re moving.
	2022-03-08: Is the Proxima System Our Best Hope For Another Earth? 01:38: That parallax revealed the system to be close - closer than any other - but still more than four light years distant.
	2022-02-23: Are Cosmic Strings Cracks in the Universe? 10:09: ... gravity.   When a massive object sits between  us and a distant light source, it bends all   passing rays of light inwards, so ...
	2022-02-16: Is The Wave Function The Building Block of Reality? 16:15: ... the point of view of falling matter, but from the point of view of a distant observer. Only the distant observer sees matter approach a state of ...
	2022-02-10: The Nature of Space and Time AMA 00:03: ... in all parts of the universe in deep gravitational wells uh in the distant past for objects that we see in the distant past and it works um which ...
	2022-01-27: How Does Gravity Escape A Black Hole? 16:04: Distant galaxies appear to be moving away because space on the largest scales is expanding evenly everywhere.
	2022-01-19: How To Build The Universe in a Computer 06:00: ... it’s important to consider every individual interaction, but for more distant locations it’s okay to clump particles  together and consider ... 06:43: ... now you have a shortcut - when you calculate  the effect from distant locations, you don’t do it for each particle - instead you do it for all ... 06:00: ... it’s important to consider every individual interaction, but for more distant locations it’s okay to clump particles  together and consider only  ... 06:43: ... now you have a shortcut - when you calculate  the effect from distant locations, you don’t do it for each particle - instead you do it for all particles ...
	2021-12-29: How to Find ALIEN Dyson Spheres 02:42: If you were to observe Earth from a distant solar system, you might notice that it looks strangely dark. 12:12: ... identify a single Dyson sphere's effects around individual stars at distant galaxies. But what if a civilization in one of those has occupied its ... 13:55: ... the galaxy, perhaps to be noticed by younger species when they emerge in distant, future parts of space ... 12:12: ... identify a single Dyson sphere's effects around individual stars at distant galaxies. But what if a civilization in one of those has occupied its entire home ... 02:42: If you were to observe Earth from a distant solar system, you might notice that it looks strangely dark.
	2021-12-20: What Happens If A Black Hole Hits Earth? 00:29: ... The nearest known is - the Cygnus X-1 black hole - at 1000 light years distant. It’s currently devouring its binary companion star, which is how we see ... 02:50: ... enough of these black holes then they’d frequently pass in front of more distant stars, magnifying those stars’ light with gravitational ... 03:25: ... stars like Cygnus X-1, and they don’t warp the passage of light from distant stars strongly enough to easily spot them. But fortunately for ... 16:33: ... in its experience it keeps falling. Meanwhile from the perspective of a distant observer it becomes a stringy ... 02:50: ... enough of these black holes then they’d frequently pass in front of more distant stars, magnifying those stars’ light with gravitational ... 03:25: ... stars like Cygnus X-1, and they don’t warp the passage of light from distant stars strongly enough to easily spot them. But fortunately for astronomers, ... 02:50: ... enough of these black holes then they’d frequently pass in front of more distant stars, magnifying those stars’ light with gravitational ...
	2021-12-10: 2021 End of Year AMA! 00:02: ... appear to be and the coolest of those occasions where you have a very distant object whose light traveling through einstein's universe of curved ...
	2021-11-17: Are Black Holes Actually Fuzzballs? 13:43: Perhaps that’ll come when we find evidence of fuzziness surrounding those distant holes in the fabric of space time.
	2021-11-10: What If Our Understanding of Gravity Is Wrong? 00:42: ... the path of light to the degree seen in gravitational lenses - when more distant light sources are warped by an intervening ...
	2021-09-07: First Detection of Light from Behind a Black Hole 12:54: ... distances - as in, could we see the effects of FTL communication from distant alien ...
	2021-08-03: How An Extreme New Star Could Change All Cosmology 05:01: ... the motion of the Earth causes a star to appear to move relative to more distant stars. Until recently it's only been possible to do this for the most ...
	2021-07-21: How Magnetism Shapes The Universe 08:12: So by measuring the Faraday rotation of distant radio sources we can also map magnetic fields. 08:21: We even have clear views of magnetic fields in many distant spiral galaxies. 08:12: So by measuring the Faraday rotation of distant radio sources we can also map magnetic fields. 08:21: We even have clear views of magnetic fields in many distant spiral galaxies.
	2021-06-09: Are We Running Out of Space Above Earth? 11:45: For a rocket passing straight through on its way to higher obits, or to more distant parts, the risk will probably will be tolerablely low.
	2021-05-25: What If (Tiny) Black Holes Are Everywhere? 02:17: To a distant observer it would look like the black hole is radiating particles. 03:45: ... gives us this nice picture of a far, far distant future in which the stars have gone out and we only have black holes, ... 04:26: ... connect the high-gravity region near the black hole with a very distant zero-gravity region where the Hawking radiation is ... 03:45: ... gives us this nice picture of a far, far distant future in which the stars have gone out and we only have black holes, which one ... 02:17: To a distant observer it would look like the black hole is radiating particles. 04:26: ... connect the high-gravity region near the black hole with a very distant zero-gravity region where the Hawking radiation is ...
	2021-04-13: What If Dark Matter Is Just Black Holes? 07:44: ... a compact mass like a black hole passes in front of a distant light source, the warped spacetime around the black hole acts like a ...
	2021-03-16: The NEW Crisis in Cosmology 01:16: ... first figured this out. Long story short  - when a distant galaxy’s light travels to   us through the expanding universe ... 02:07: ... those to measure distances to nearby stars,   then more distant stars, then nearby  galaxies, then distant galaxies,  ... 07:28: ... course of the year, nearby stars appear to move relative to more distant stars.   That’s stellar parallax, and our quest to ... 10:40: ... warping of spacetime.   One manifestation of this is when a distant quasar - a giant, gas-guzzling black hole - happens to ... 02:07: ... then more distant stars, then nearby  galaxies, then distant galaxies,  ... 01:16: ... first figured this out. Long story short  - when a distant galaxy’s light travels to   us through the expanding universe it ... 10:40: ... warping of spacetime.   One manifestation of this is when a distant quasar - a giant, gas-guzzling black hole - happens to be   closely ... 02:07: ... those to measure distances to nearby stars,   then more distant stars, then nearby  galaxies, then distant galaxies,  ... 07:28: ... course of the year, nearby stars appear to move relative to more distant stars.   That’s stellar parallax, and our quest to measure it has been ...
	2021-02-24: Does Time Cause Gravity? 02:51: Clocks closer to the Earth take longer to tick for every tick on a distant clock. 02:58: ... we have this sense of time flowing in a gradient - faster streams distant from the Earth, slower streams near ... 08:39: Last time we talked about the gravitational wave background - the ambient buzz of gravitational waves from the distant and ancient universe. 02:51: Clocks closer to the Earth take longer to tick for every tick on a distant clock.
	2021-02-10: How Does Gravity Warp the Flow of Time? 01:00: ... is identical to the sense of weight you would feel accelerating at 1-g distant from any gravitational field - at least as far as the laws of physics ...
	2021-01-26: Is Dark Matter Made of Particles? 03:05: ... otherwise we’d be able to detect it when it blocked light from the more distant universe - in the same way we “see” the black lanes of dust that block ...
	2020-12-15: The Supernova At The End of Time 11:03: ... should result in a new type of supernova that will only happen in that distant future - a black dwarf ... 11:45: ... thing to look forward to - Iron stars exploding in unimaginably distant future of space ... 11:03: ... should result in a new type of supernova that will only happen in that distant future - a black dwarf ... 11:45: ... thing to look forward to - Iron stars exploding in unimaginably distant future of space ... 11:03: ... should result in a new type of supernova that will only happen in that distant future - a black dwarf ...
	2020-10-13: Do the Past and Future Exist? 06:17: That means any distant event is already in the past by the time we see it. 07:29: Successive shells of light from more distant parts of that time-slice arrive one after the other, expanding your view. 06:17: That means any distant event is already in the past by the time we see it. 07:29: Successive shells of light from more distant parts of that time-slice arrive one after the other, expanding your view.
	2020-09-21: Could Life Evolve Inside Stars? 10:23: And who knows what other bizarre life forms may be waiting to be discovered, in distant, stranger parts of space time.
	2020-08-17: How Stars Destroy Each Other 10:10: ... to us they seem a little petulant. Like the final slamming of doors from distant parts of ...
	2020-07-20: The Boundary Between Black Holes & Neutron Stars 08:26: We also see the results of these mergers in gamma ray bursts - frequent flashes of energetic light from the distant universe. 14:25: ... there’s no way to directly test if distant galaxies are actually antimatter galaxies - they should emit exactly the ... 08:26: We also see the results of these mergers in gamma ray bursts - frequent flashes of energetic light from the distant universe.
	2020-06-30: Dissolving an Event Horizon 06:31: ... leaves us with a strange situation - in the far distant future, even if all particles in the universe decay, we may be left with ...
	2020-06-08: Can Viruses Travel Between Planets? 03:46: RNA-based viruses in particular may have emerged from the pre-cellular RNA world, which would make them our most distant cousins on the tree of life.
	2020-05-18: Mapping the Multiverse 16:07: ... across was the following: As you rewind the universe towards zero age, distant points in space end up closer and closer - and there is no point that is ...
	2020-05-11: How Luminiferous Aether Led to Relativity 15:32: ... back then, Steve asks what was the diameter of the universe at the most distant point represented by the cosmic microwave background ... 16:14: ... the local Virgo supercluster. That's so weird to think about - the most distant horizon we can see is the same size as the local bubble of galaxies. ... 15:32: ... back then, Steve asks what was the diameter of the universe at the most distant point represented by the cosmic microwave background ...
	2020-05-04: How We Know The Universe is Ancient 01:35: ... as spiral nebulae. Were they blobs of gas in the Milky Way, or vast, distant groups of stars - other “Milky Ways”, or as Immanuel Kant called them, ... 06:22: ... a galaxy is moving away from us given its distance from us - the more distant, the faster it’s moving away. In the near-century since Edwin Hubble’s ... 07:40: ... had observed a brighter variety of Cepheids in distant galaxies, but he then used a period- luminosity relationship measured ... 01:35: ... as spiral nebulae. Were they blobs of gas in the Milky Way, or vast, distant groups of stars - other “Milky Ways”, or as Immanuel Kant called them, island ...
	2020-04-22: Will Wormholes Allow Fast Interstellar Travel? 02:08: ... have to connect parallel layers of reality - it could instead connect distant regions of our ... 13:26: ... links wormholes with entanglement and may provides a passage not to distant parts of spacetime, but to deeper understanding of its nature. Which we ... 02:08: ... have to connect parallel layers of reality - it could instead connect distant regions of our ...
	2020-03-31: What’s On The Other Side Of A Black Hole? 01:53: ... at the event horizon, time appears to freeze from the point of view of a distant observer. And the Schwarzschild metric is defined in terms of that ... 10:58: ... pried open. That’s a huge if, but it would allow instant travel between distant locations. And in the case of rotating black holes, the traversable ... 01:53: ... at the event horizon, time appears to freeze from the point of view of a distant observer. And the Schwarzschild metric is defined in terms of that observer’s ...
	2020-03-24: How Black Holes Spin Space Time 01:01: ... mergers, we’ve witnessed the havoc they wreak on their surroundings in distant quasars and in our own galaxy, and we’ve even taken an image of a black ...
	2020-02-11: Are Axions Dark Matter? 09:45: ... there does appear to be a slight overabundance of gamma rays from very distant astrophysical sources like blazars. A lot of those gamma rays should be ...
	2020-01-20: Solving the Three Body Problem 00:20: ... could be used in principle be used to calculate their locations at any distant time, future or past. I say “in principle” because the reality is not so ... 06:20: ... simulations can accurately predict the motion of the planets into the distant future or solve for millions of objects to simulate the formation and ... 00:20: ... could be used in principle be used to calculate their locations at any distant time, future or past. I say “in principle” because the reality is not so ...
	2019-12-17: Do Black Holes Create New Universes? 07:16: ... Alexander Vilenkin proposed that if a universe lasts forever then in the distant future, quantum fluctuations of that near vacuum will cause black holes ... 15:11: ... perhaps we'll eventually also be wrong ancient philosophers to some very distant future ... 15:34: Now, the real problem with the doomsday argument isn't that users of it in the distant past would be wrong. 07:16: ... Alexander Vilenkin proposed that if a universe lasts forever then in the distant future, quantum fluctuations of that near vacuum will cause black holes to ... 15:11: ... perhaps we'll eventually also be wrong ancient philosophers to some very distant future ... 07:16: ... Alexander Vilenkin proposed that if a universe lasts forever then in the distant future, quantum fluctuations of that near vacuum will cause black holes to spontaneously ...
	2019-11-18: Can You Observe a Typical Universe? 01:11: It’s extremely important - it allows us to study the distant universe confident that its laws of physics are the same as we experience on Earth. 01:20: It allows us to understand the origin of the Earth and the Milky Way by studying the ancient light of distant galaxies. 01:11: It’s extremely important - it allows us to study the distant universe confident that its laws of physics are the same as we experience on Earth.
	2019-11-04: Why We Might Be Alone in the Universe 13:48: And this was NOT observed in the light from a distant gamma ray burst, which presents a challenge for the theory.
	2019-10-21: Is Time Travel Impossible? 04:00: This has the obvious benefit of allowing you to teleport between distant points in space, but also between distant points in time.
	2019-09-23: Is Pluto a Planet? 06:30: New astronomy textbooks included distant Pluto and generations of students memorized 9 rather than 8 planets.
	2019-07-25: Deciphering The Vast Scale of the Universe 04:12: That means if you spot a Cepheid variable in a distant spiral nebulae you can find the distance to both. 08:07: That distant light comes to us from a much younger universe. 08:16: ... see these most distant quasars, as well as the earliest galaxies or even black holes or worlds ... 08:07: That distant light comes to us from a much younger universe. 08:16: ... see these most distant quasars, as well as the earliest galaxies or even black holes or worlds around ... 04:12: That means if you spot a Cepheid variable in a distant spiral nebulae you can find the distance to both.
	2019-06-20: The Quasar from The Beginning of Time 02:06: ... of years through our expanding universe. The quasar appeared to be more distant than any we had ever seen. But that doesn't mean we can't unravel their ... 04:01: ... Although the air above the observatory is crystal clear, it still blurs distant light somewhat. Turbulence in the atmosphere causes incoming wavefronts ... 04:46: This is the instrument used to analyze the most distant quasar. 04:01: ... Although the air above the observatory is crystal clear, it still blurs distant light somewhat. Turbulence in the atmosphere causes incoming wavefronts of ... 04:46: This is the instrument used to analyze the most distant quasar.
	2019-06-06: The Alchemy of Neutron Star Collisions 02:47: ... their formation a collision of ancient stellar corpses in an earlier and distant space-time okay last time we talked about the cosmic dark ages that ... 12:15: ... with so little in this case from a single point of light that is that distant quasar." - Jan Pieter Cornet asks something that I hoped one of you ... 02:47: ... their formation a collision of ancient stellar corpses in an earlier and distant space-time okay last time we talked about the cosmic dark ages that mysterious time ...
	2019-05-16: The Cosmic Dark Ages 07:19: ... red dots in our most sensitive surveys. As the light of those most distant quasars traveled to us it passed through the last remnants of neutral ...
	2019-05-01: The Real Science of the EHT Black Hole 01:53: We can think of light from a very distant point as coming in a series or plane waves.
	2019-04-24: No Dark Matter = Proof of Dark Matter? 00:03: ... corpses or primordial black holes then we'd see the warping of of more distant stars in their gravitational fields in other words we'd see their ...
	2019-04-03: The Edge of an Infinite Universe 08:37: He found that two “infinitely distant” regions could not both be in a perfect vacuum state if a black hole lay between them. 14:40: The hologram part is because the lower dimensional space can be thought of as the infinitely distant boundary of the higher dimensional space. 14:49: Every particle, every gravitational effect in the bulk is represented by quantum fields on an infinitely distant surface. 14:40: The hologram part is because the lower dimensional space can be thought of as the infinitely distant boundary of the higher dimensional space. 08:37: He found that two “infinitely distant” regions could not both be in a perfect vacuum state if a black hole lay between them. 14:49: Every particle, every gravitational effect in the bulk is represented by quantum fields on an infinitely distant surface.
	2019-03-28: Could the Universe End by Tearing Apart Every Atom? 12:40: ... acceleration rate measured using distant quasars hints at an equation of state parameter slightly less than ... 13:18: ... that dark energy may be increasing in strength based on measurements of distant ... 12:40: ... acceleration rate measured using distant quasars hints at an equation of state parameter slightly less than negative 1 ... 13:18: ... that dark energy may be increasing in strength based on measurements of distant quasars. ... 12:40: ... acceleration rate measured using distant quasars hints at an equation of state parameter slightly less than negative 1 well ...
	2019-03-20: Is Dark Energy Getting Stronger? 04:40: The most distant supernova we’ve seen is so far away that its light has been traveling to us for around 75% of the age of the universe. 10:15: The most distant existed when the universe was less than 10% of its current age. 11:35: ... thought, that could explain the extra stretching of the light from these distant ... 13:36: ... there are still relatively few very distant quasars with good X-ray measurements, so maybe the random variations in ... 10:15: The most distant existed when the universe was less than 10% of its current age. 11:35: ... thought, that could explain the extra stretching of the light from these distant quasars. ... 13:36: ... there are still relatively few very distant quasars with good X-ray measurements, so maybe the random variations in the ... 04:40: The most distant supernova we’ve seen is so far away that its light has been traveling to us for around 75% of the age of the universe.
	2019-02-07: Sound Waves from the Beginning of Time 09:01: The more stretching, the longer that light has travelled, and so the more distant that galaxy must be. 11:00: Dark energy was first discovered by using distant supernovae as distance measurements- to track the rate of expansion of the universe.
	2019-01-24: The Crisis in Cosmology 01:54: And it's fundamental for interpreting our observations of the distant universe,... 14:22: We see it in the warping of images of distant objects,... 01:54: And it's fundamental for interpreting our observations of the distant universe,...
	2019-01-09: Are Dark Matter And Dark Energy The Same? 01:52: Observations of distant supernovae tell us that the expansion of the universe is accelerating.
	2018-12-06: Did Life on Earth Come from Space? 00:37: ... that life on Earth didn't start on earth at all perhaps it started on a distant world somewhere in the Milky Way and somehow survived a long journey ...
	2018-11-14: Supersymmetric Particle Found? 10:05: In fact, one of the two events may have been associated with a distant supernova that was observed around the same time and location.
	2018-10-03: How to Detect Extra Dimensions 01:42: ... the electromagnetic spectrum and, ultimately, with the discovery of the distant galaxy in which the explosion ... 02:48: Imagine a pulse of light traveling from some distant source. 01:42: ... the electromagnetic spectrum and, ultimately, with the discovery of the distant galaxy in which the explosion ... 02:48: Imagine a pulse of light traveling from some distant source.
	2018-09-12: How Much Information is in the Universe? 15:41: ... that a metaphor for quantum fluctuations in impossibly distant futures spontaneously generating a new big bang by pure chance, or do ...
	2018-06-27: How Asteroid Mining Will Save Earth 10:26: ... perhaps the real work can begin of expanding humanity's reach into more distant regions of space ...
	2018-05-16: Noether's Theorem and The Symmetries of Reality 11:05: ... system objects, detect the effects of weak gravitational lensing in distant galaxies, and see more distant supernovae, monitoring more distant ...
	2018-05-09: How Gaia Changed Astronomy Forever 07:51: Gaia has also mapped the position and brightnesses of over half a million quasars-- the cause of distant active galaxies.
	2018-05-02: The Star at the End of Time 00:00: [MUSIC PLAYING] If our descendants or any conscious being is around to witness the very distant future of our galaxy, what will they see?
	2018-04-04: The Unruh Effect 06:53: This is because that distant point of space-time is smoothly connected to the space-time near the horizon. 10:29: ... at the event horizon and the particles of Hawking radiation seen by a distant ... 06:53: This is because that distant point of space-time is smoothly connected to the space-time near the horizon.
	2018-03-28: The Andromeda-Milky Way Collision 02:01: In the mid 1700s, he hypothesized that Andromeda was an island universe, a vast sea of stars distant to our own. 05:43: We see these in other distant galaxies, like the Antennae, which are currently in the process of collision. 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. 05:43: We see these in other distant galaxies, like the Antennae, which are currently in the process of collision.
	2018-03-15: Hawking Radiation 05:44: A distant future observer sees radiation coming from the black hole. 05:49: Hawking's imaginary path from the distant past to the distant future was brilliant. 09:22: This radiation is visible only to distant observers. 05:44: A distant future observer sees radiation coming from the black hole. 05:49: Hawking's imaginary path from the distant past to the distant future was brilliant. 05:44: A distant future observer sees radiation coming from the black hole. 09:22: This radiation is visible only to distant observers.
	2018-03-07: Should Space be Privatized? 03:58: And besides the distant dream of space tourism, there isn't much money in sending people to space, at least compared to launching satellites.
	2018-02-21: The Death of the Sun 10:31: The resulting combined nucleus is lighter than the sum of the masses of the two distant protons.
	2018-01-10: What Do Stars Sound Like? 00:32: This is impressive given the fact that they are impossibly distant opaque balls of fiery plasma. 01:54: The fast-growing field of asteroseismology uses these oscillations to probe the interiors of the distant stars. 00:32: This is impressive given the fact that they are impossibly distant opaque balls of fiery plasma. 01:54: The fast-growing field of asteroseismology uses these oscillations to probe the interiors of the distant stars.
	2017-12-20: Extinction by Gamma-Ray Burst 02:05: ... from the Earth being blasted by the intense radiation jets from a distant exploding ... 03:16: Roughly once per day, the jet from such an explosion in a distant galaxy reaches the earth and is detected by the Swift or Fermi satellites. 02:05: ... from the Earth being blasted by the intense radiation jets from a distant exploding ... 03:16: Roughly once per day, the jet from such an explosion in a distant galaxy reaches the earth and is detected by the Swift or Fermi satellites.
	2017-12-13: The Origin of 'Oumuamua, Our First Interstellar Visitor 08:06: Anything smaller or more distant would be missed.
	2017-12-06: Understanding the Uncertainty Principle with Quantum Fourier Series 13:13: ... kill time during warp journeys by scanning light curves of distant stars for the characteristic dips in brightness due to transiting alien ...
	2017-11-29: Citizen Science + Zero-Point Challenge Answer 01:52: These exploding stars show up as transient point of light, typically in very distant galaxies.
	2017-11-22: Suicide Space Robots 08:17: It's now silenced, riding it's eternal cometary home into the distant Kuiper Belt. 11:15: So they're only distantly related to other subfamilies in Gekkonidae.
	2017-10-25: The Missing Mass Mystery 03:50: We still see that light today traveling to us from distant parts. 06:39: Absorption features in the light of distant quasars reveal this gas lurking between clusters of galaxies. 03:50: We still see that light today traveling to us from distant parts. 06:39: Absorption features in the light of distant quasars reveal this gas lurking between clusters of galaxies.
	2017-09-28: Are the Fundamental Constants Changing? 08:26: ... measurement is really, really difficult. Photons from these extremely distant quasars and gas clouds are massively redshifted-- their wavelengths ...
	2017-09-20: The Future of Space Telescopes 01:44: Train a distant telescope on us, and it would be overwhelmed by the sun's rays. 06:25: ... optics and a camera at that focus, and you have an image of the distant source that's 100 or 1,000 times better in resolution than the Hubble ... 08:19: However, it would be able to see x-rays right down to the event horizons of super massive black holes in distant galaxies. 06:25: ... optics and a camera at that focus, and you have an image of the distant source that's 100 or 1,000 times better in resolution than the Hubble Space ... 01:44: Train a distant telescope on us, and it would be overwhelmed by the sun's rays.
	2017-08-30: White Holes 12:19: In the not too distant future, we'll investigate the reality of this mysterious parallel patch of space time.
	2017-08-24: First Detection of Life 07:26: To be more precise, we analyze the light of a distant star as it passes through the atmosphere of one of its planets. 10:31: Perhaps that answer is already traveling to us in the light of a distant planet's atmosphere calling to us from across spacetime. 07:26: To be more precise, we analyze the light of a distant star as it passes through the atmosphere of one of its planets.
	2017-08-02: Dark Flow 00:37: Distant galaxies are thrust apart from each other as the space between them grows. 04:11: This allows astronomers to find extremely distant galaxy clusters just by studying the CMB. 00:37: Distant galaxies are thrust apart from each other as the space between them grows. 04:11: This allows astronomers to find extremely distant galaxy clusters just by studying the CMB.
	2017-06-07: Supervoids vs Colliding Universes! 10:01: If that merger point is distant from us, then this looks like a hot or cold spot in the cosmic microwave background.
	2017-05-17: Martian Evolution 00:14: But there may be nothing at all familiar about these distant future space farers.
	2017-04-05: Telescopes on the Moon 09:03: ... we can meet its distant challenges with creative solutions, perhaps the moon will become the ...
	2017-03-29: How Time Becomes Space Inside a Black Hole 07:20: Meanwhile our past light cone now encompasses light that has been struggling to escape from just above the event horizon since the distant past.
	2017-02-15: Telescopes of Tomorrow 05:40: We can think of light from a very distant point-like object-- say a star-- as reaching us as a series of wavefronts. 09:06: ... explosions in the universe or record the twinkling of objects in the distant universe as their brightnesses fluctuate due to the changing ... 05:40: We can think of light from a very distant point-like object-- say a star-- as reaching us as a series of wavefronts. 09:06: ... explosions in the universe or record the twinkling of objects in the distant universe as their brightnesses fluctuate due to the changing gravitational effect ...
	2017-02-02: The Geometry of Causality 08:20: ... from that origin by the same spacetime interval as an event that is very distant in both space and ... 08:35: ... to travel from the origin to a nearby near-future event compared to a distant far future event on the same ...
	2017-01-11: The EM Drive: Fact or Fantasy? 09:01: A distant third is that it's something brand new, like this quantum vacuum stuff.
	2017-01-04: How to See Black Holes + Kugelblitz Challenge Answer 04:02: These black holes occasionally pass in front of more distant background stars, gravitationally lensing the star's light. 04:15: ... interferometry will enable incredibly high-res mapping, and the distant star should appear to split into two or four images as its light passes ... 04:02: These black holes occasionally pass in front of more distant background stars, gravitationally lensing the star's light. 04:15: ... interferometry will enable incredibly high-res mapping, and the distant star should appear to split into two or four images as its light passes ...
	2016-12-21: Have They Seen Us? 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 frequency with our ... 09:02: These emission spikes may also shift back and forth in frequency due to Doppler shift, as the distant technologically advanced planet orbits its star. 14:32: So a distant immortal observer, with a ridiculously good telescope, will detect photons from the falling monkey at all future times. 16:31: ... to the black hole's stationary frame of reference as recorded by a distant ... 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 frequency with our own ... 14:32: So a distant immortal observer, with a ridiculously good telescope, will detect photons from the falling monkey at all future times. 16:31: ... to the black hole's stationary frame of reference as recorded by a distant observer. ... 09:02: These emission spikes may also shift back and forth in frequency due to Doppler shift, as the distant technologically advanced planet orbits its star.
	2016-12-08: What Happens at the Event Horizon? 05:24: ... an enormous number of time and space steps, only reaching us in our very distant ...
	2016-11-16: Strange Stars 07:40: ... found a young pulsar, a rapidly rotating neutron star 10,000 light years distant. ...
	2016-10-12: Black Holes from the Dawn of Time 05:27: In stars in our galaxy, in distant quasars, even in gamma ray bursts.
	2016-09-14: Self-Replicating Robots and Galactic Domination 06:09: At some point, the assembler starts building new Von Neumann probes which, one by one, launch to new, more distant star systems.
	2016-08-24: Should We Build a Dyson Sphere? 00:11: ... Telescope observation of swarms of somethings partially eclipsing a distant star has led to some rampant ... 03:10: The crazy thing about the Dyson swarm is that we could probably start building one in the not too distant future. 00:11: ... Telescope observation of swarms of somethings partially eclipsing a distant star has led to some rampant ...
	2016-08-17: Quantum Eraser Lottery Challenge 04:02: ... end of the experiment, to the screen, which could theoretically be very distant in both space and ...
	2016-08-10: How the Quantum Eraser Rewrites the Past 12:15: A few of you pointed out that I neglected to mention certain known ends of the world that are coming in the distant future.
	2016-06-15: The Strange Universe of Gravitational Lensing 03:25: At its most spectacular, we see extreme warping of the shapes of distant galaxies. 04:51: This is the Einstein Cross, an extremely luminous distant quasar powered by a supermassive black hole feeding on its surroundings. 09:23: But look through a telescope at very distant galaxies, and all are brightened, shifted and warped by the weird lens of a curved spacetime. 03:25: At its most spectacular, we see extreme warping of the shapes of distant galaxies. 09:23: But look through a telescope at very distant galaxies, and all are brightened, shifted and warped by the weird lens of a curved spacetime. 04:51: This is the Einstein Cross, an extremely luminous distant quasar powered by a supermassive black hole feeding on its surroundings.
	2016-05-25: Is an Ice Age Coming? 02:46: ... the absolute maximum eccentricity, Earth's most distant point from the sun-- the Aphelion-- is about 30% further than the ...
	2016-05-18: Anti-gravity and the True Nature of Dark Energy 01:12: We know this, because we've mapped its past expansion history using distant supernovae.
	2016-04-27: What Does Dark Energy Really Do? 01:23: That history is coded in every photon of light that reaches our telescopes from the distant universe. 02:53: ... in the time it took their light to reach us-- so billions of light years distant. ... 05:46: ... or closer in a high-density, recollapsing universe and faint or more distant in a low-density, infinitely-expanding ... 01:23: That history is coded in every photon of light that reaches our telescopes from the distant universe.
	2016-04-13: Will the Universe Expand Forever? 03:40: ... dark energy-- the universe also has an escape velocity that lets distant galaxies escape each other's gravitational ... 06:56: ... universe will eventually fall back inwards, and we'll see many of those distant galaxies up very close and personal as the universe undergoes the Big ... 08:07: In a way, we're lucky to be living in an era where we can still even see the distant galaxies. 03:40: ... dark energy-- the universe also has an escape velocity that lets distant galaxies escape each other's gravitational ... 06:56: ... universe will eventually fall back inwards, and we'll see many of those distant galaxies up very close and personal as the universe undergoes the Big ... 08:07: In a way, we're lucky to be living in an era where we can still even see the distant galaxies. 03:40: ... dark energy-- the universe also has an escape velocity that lets distant galaxies escape each other's gravitational ...
	2016-03-23: How Cosmic Inflation Flattened the Universe 00:55: ... huge, 93 billion light years from one edge to the other, that those most distant points should never have had time to communicate with each ... 01:05: And yet, at some point in the distant past, they must have been in contact. 00:55: ... huge, 93 billion light years from one edge to the other, that those most distant points should never have had time to communicate with each ...
	2016-03-02: What’s Wrong With the Big Bang Theory? 00:00: [MUSIC PLAYING] When we look out at distant galaxies, we see that they are all racing away from us. 06:23: ... in order for the most distant patch of the universe we can see in that direction to have the same ... 00:00: [MUSIC PLAYING] When we look out at distant galaxies, we see that they are all racing away from us. 06:23: ... in order for the most distant patch of the universe we can see in that direction to have the same ...
	2016-02-24: Why the Big Bang Definitely Happened 01:42: Light from distant galaxies is red shifted, stretched to longer wavelengths.
	2016-02-17: Planet X Discovered?? + Challenge Winners! 00:35: ... was demoted to dwarf planet partly due to Brown's discovery of Eris, a distant planetary body that's larger than ... 01:31: ... simulations and found a single compelling solution, a very, very distant giant planet, with a mass well over 10 times that of the Earth, and a ... 00:35: ... was demoted to dwarf planet partly due to Brown's discovery of Eris, a distant planetary body that's larger than ...
	2016-02-11: LIGO's First Detection of Gravitational Waves! 00:49: ... in the fabric of spacetime caused by extreme gravitational events in the distant ... 01:35: Since then, ripples from mergers of black hole pairs in distant galaxies have changed the shape of spacetime here on Earth. 02:57: ... the waves produced when these stellar cores are still distant from each other are far too weak, and have too low of frequency for LIGO ... 01:35: Since then, ripples from mergers of black hole pairs in distant galaxies have changed the shape of spacetime here on Earth. 00:49: ... in the fabric of spacetime caused by extreme gravitational events in the distant universe. ...
	2015-12-16: The Higgs Mechanism Explained 08:06: ... falling into the black hole adds to its effective mass as seen by a distant observer even before it crosses the event ...
	2015-11-05: Why Haven't We Found Alien Life? 09:58: ... that we are a very early outlier and that any other civilizations are so distant as to not yet be ...
	2015-10-28: Is The Alcubierre Warp Drive Possible? 01:40: ... about in this episode, the expansion of the universe means that very distant galaxies are moving apart from each other faster than light, even if the ...
	2015-10-22: Have Gravitational Waves Been Discovered?!? 03:58: Any g-wave that we're likely to spot is going to come from a distant galaxy, hundreds of millions of light-years away.
	2015-10-15: 5 REAL Possibilities for Interstellar Travel 09:11: This is a possible yet very distant technology.
	2015-09-30: What Happens At The Edge Of The Universe? 01:28: It's the distance to that blob of the CMB, the most distant thing we can see in that direction. 01:49: It's the current instantaneous distance to the most distant part of the universe that could possibly have a causal connection to us. 01:28: It's the distance to that blob of the CMB, the most distant thing we can see in that direction.
	2015-09-23: Does Dark Matter BREAK Physics? 02:53: But when, say, a black hole passes between us and a more distant star, we sometimes see a brightening of that star. 05:21: Map the mass based on the warping of light from more distant galaxies. 08:59: ... monkey is eternally frozen on the event horizon with respect to a distant observer, shouldn't the black hole evaporate beneath ... 10:07: The distant observer does witness the instance that the black hole evaporates, with a huge burst of Hawking radiation. 10:21: It never even happens in the distant observer's universe, either before or after the black hole's evaporation. 05:21: Map the mass based on the warping of light from more distant galaxies. 08:59: ... monkey is eternally frozen on the event horizon with respect to a distant observer, shouldn't the black hole evaporate beneath ... 10:07: The distant observer does witness the instance that the black hole evaporates, with a huge burst of Hawking radiation. 08:59: ... monkey is eternally frozen on the event horizon with respect to a distant observer, shouldn't the black hole evaporate beneath ... 10:21: It never even happens in the distant observer's universe, either before or after the black hole's evaporation. 02:53: But when, say, a black hole passes between us and a more distant star, we sometimes see a brightening of that star.
	2015-08-27: Watch THIS! (New Host + Challenge Winners) 03:34: Which quasar is the most distant object ever observed?
	2015-07-29: General Relativity & Curved Spacetime Explained! 04:52: In order to compare distant parts of the Earth, you'd need a single frame that extends across spacetime patches.
	2015-04-01: Is the Moon in Majora’s Mask a Black Hole? 08:49: With each passing moment of time, any observer sitting anywhere will see photons that were emitted from progressively more distant locations.
	2015-03-11: What Will Destroy Planet Earth? 05:14: ... as galaxies flying apart through space, but instead as the space between distant galaxies stretching, like ...
	2015-02-25: How Do You Measure the Size of the Universe? 03:07: ... space were not expanding, then light from a distant galaxy would be the same color when it arrived on Earth as it was when ... 03:31: The light from more distant galaxies is redshifted more than light from nearby ones. 03:37: You see, the light from more distant places has further to go. 03:31: The light from more distant galaxies is redshifted more than light from nearby ones. 03:07: ... space were not expanding, then light from a distant galaxy would be the same color when it arrived on Earth as it was when it first ... 03:37: You see, the light from more distant places has further to go.

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