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	2022-11-23: How To See Black Holes By Catching Neutrinos 02:50: These spread out in every direction, so a mere 100 trillion pass through your body every second. 14:54: 100 trillion neutrinos pass through your body every second, and on average one single neutrino will be stopped by your body if you live 100 years. 15:05: ... 6 cubic centermeters, which is 5,000 times smaller than your whole body, counting both eyes - so it’ll take 100 years times 5000 to stop a ...
	2022-09-14: Could the Higgs Boson Lead Us to Dark Matter? 01:18: ... a hundred trillion neutrinos emitted by the sun pass through your body every second, but you don’t notice because they extremely rarely ...
	2022-07-27: How Many States Of Matter Are There? 13:30: Check out “Why Am I Like This” which looks at the evolutionary biology of the human body and how we ended up with all these quirks.
	2022-03-08: Is the Proxima System Our Best Hope For Another Earth? 08:36: ... of planets around its Sun-like siblings - a Neptunish body may have been imaged around Rigel Kentaurus and an Earth-sized body may ... 11:22: ... convection through the star’s body generates crazy magnetic storms, which can cause the star to have ...
	2022-02-10: The Nature of Space and Time AMA 00:03: ... that describes the shape of space around circularly symmetric mass of body as being a uh a a literal cascade in the fabric of space downwards ...
	2022-01-19: How To Build The Universe in a Computer 02:56: ... to write down equations describing the trajectories of a pair of massive bodies moving in each other’s gravitational ... 03:12: But note that I said “pairs” of bodies. 03:17: For 3 or more bodies there  is no simple set of equations   describing their future evolution under gravity.
	2021-12-29: How to Find ALIEN Dyson Spheres 11:22: But in 2019 it became somewhat clear this dimming was probably due to the debris of a tidally disrupted moon-size body.
	2021-12-10: 2021 End of Year AMA! 00:02: ... right now on gravitational lensing so using the fact that massive bodies bend the paths of light according to einstein's theory of general ...
	2021-11-02: Is ACTION The Most Fundamental Property in Physics? 01:22: ... do this, all you needed to do was know the exact vector forces on each body at each time, which lets you calculate its exact vector positions, ...
	2021-10-20: Will Constructor Theory REWRITE Physics? 05:31: ... laws of general relativity forbid this task: as a free-falling body the apple must follow a geodesic through spacetime, which results in it ...
	2021-08-18: How Vacuum Decay Would Destroy The Universe 10:54: ... water - dust provides sites for bubble nucleation, and the entire body of water rapidly evaporating. Now,   there was some fear that ...
	2021-07-13: Where Are The Worlds In Many Worlds? 10:19: Ultimately your body’s position wavefunction splits - in one version you move left, in the other you move right.
	2021-06-09: Are We Running Out of Space Above Earth? 05:03: And yet are still large enough to cause ‘lethal’ collisions- the kind that can obliterate a satellite if they hit right in the main body.
	2021-04-13: What If Dark Matter Is Just Black Holes? 00:00: ... black holes streaming through the solar system, the planet, even our bodies every ...
	2021-03-09: How Does Gravity Affect Light? 04:27: ... if the density of the gravitating body is large enough, light emerging from it can be sapped of ALL energy - ...
	2021-01-26: Is Dark Matter Made of Particles? 00:00: By the time I finish this sentence, up to a billion billion dark matter particles may have streamed through your body like ghosts.
	2020-12-08: Why Do You Remember The Past But Not The Future? 11:09: Just as our bodies expend entropy by using and redistributing energy.
	2020-08-10: Theory of Everything Controversies: Livestream 00:00: ... something but i think we should give eric a chance to respond to that body blow landed in the ninth round uh yeah and not just a chance to ...
	2020-07-20: The Boundary Between Black Holes & Neutron Stars 00:58: It seemed innocuous enough at first glance - two compact bodies spiraling together. 01:04: ... using Einstein’s general theory of relativity, the masses of those bodies were ... 04:31: What was that smaller body?
	2020-06-08: Can Viruses Travel Between Planets? 08:13: This is lithopanspermia, and again - virus-ridden rocks have definitely left the Earth before, and probably impacted other bodies in our solar system.
	2020-05-27: Does Gravity Require Extra Dimensions? 02:22: The arrows get spread out over the surface of a sphere with the gravitating body in the center. 09:08: ... from the slightest breeze, or even the gravitational influence of other bodies - including ...
	2020-05-18: Mapping the Multiverse 05:53: ... objects in freefall that start motionless relative to the gravitational body. ...
	2020-05-11: How Luminiferous Aether Led to Relativity 01:34: ... element that filled space and in crystalline state formed celestial bodies. That’s right, aether is the fifth element. Big ba da ... 02:33: ... both filled and gave reality to the space between the celestial bodies. He imagined the aether as flowing - moving in vortices. These flows ...
	2020-05-04: How We Know The Universe is Ancient 15:09: ... if you will. Same as with the rubber sheet analogy in which a massive body depresses the sheet. What "dimension" is the sheet depressing into? None ...
	2020-04-28: Space Time Livestream: Ask Matt Anything 00:00: ... sites as many of the heavy elements and many of the elements in your body okay so we have this is not really cool this is copper and zinc what ...
	2020-03-24: How Black Holes Spin Space Time 03:18: It can be used to calculate the path of any body moving near or even within a Kerr black hole - or indeed any rotating mass.
	2020-02-03: Are there Infinite Versions of You? 12:45: ... in fact it's worse than that - forget three bodies, general relativity gives no perfect analytical solutions for TWO bodies ... 13:09: ... gives simple equations for orbits which work pretty well as long as the bodies aren't too close ... 13:24: Jordan Miller suggests that the Euler and Lagrange solutions to the three body problem are just 2 body solutions in disguise. 13:41: In any 2-body system, there are these 5 places that a third body can be placed and will stay in stable orbit. 13:49: ... the 3rd body has a low mass relative to the others then the original 2-body system is ... 13:59: ... if you're willing to adjust the original 2-body system then a 3rd body of any mass can be added - either with 3 bodies in a permanent straight ... 13:24: Jordan Miller suggests that the Euler and Lagrange solutions to the three body problem are just 2 body solutions in disguise. 13:49: ... system is undisturbed, and in that case Jordan is correct. It's a two body solution. ... 13:24: Jordan Miller suggests that the Euler and Lagrange solutions to the three body problem are just 2 body solutions in disguise.
	2020-01-27: Hacking the Nature of Reality 14:22: If you place any massive body in an accretion disk it will both tug on and be tugged by the surrounding gas.
	2020-01-20: Solving the Three Body Problem 00:00: ... three body problem is famous for being impossible to solve. But actually it's been ... 00:20: ... predictability. Given the current positions and velocities of the bodies of the solar system, Newton’s equations could be used in principle be ... 01:10: ... just one more body and in most cases all motion becomes fundamentally chaotic - there ... 01:24: ... numbers are the starting positions and velocities of your gravitating bodies, plus a value for ... 02:06: ... the case of two gravitating bodies, the solutions to Newton’s laws are just the equations for the path ... 02:39: ... solutions for more complex systems, with systems of three gravitating bodies being the natural next step. But the additional influence of even a ... 02:55: ... three body problem became the obsession for many great mathematicians - but over ... 03:18: ... wild and unpredictable patterns, and almost inevitably one of the bodies is eventually ejected from the system. But despite the apparent ... 03:57: ... do we do it? Well, just because the three body problem for the most part has no useful analytic solution, approximate ... 04:29: ... useful approximation is when one of the three bodies has a very low mass compared to the other two. We can ignore the ... 05:01: ... but ultimately fail to predict perfectly. Even the smallest planetary bodies have some mass, and the solar system as a whole has many massive ... 05:25: ... tiny enough paths segments or time-steps, then the small motions of all bodies in the system can be updated step by ... 06:09: ... is called numerical integration, and when applied to the motion of many bodies it’s an N-body ... 06:43: ... The first was Leonhard Euler, who found a family of solutions for three bodies orbiting around a mutual center of mass, where all bodies remain in a ... 07:56: ... involving two masses bouncing back and forth in the center of a third body’s orbit. In the 90s Cris Moore discovered a stable figure-8 orbit of three ... 08:46: ... It’s called the shape-sphere, and it works like this. Imagine the bodies in 3-body system are the vertices of a triangle, whose center is the ... 09:25: ... appears much simpler and easier to analyze than the motion of the bodies ... 11:21: ... useful? Well, actually, almost all three-body systems eject one of the bodies, leaving a nice, stable two-body system - a binary pair. Stone and Leigh ... 02:39: ... natural next step. But the additional influence of even a single extra body appeared to make an exact solution ... 07:56: ... from that proof led to a boom in the discovery of new periodic three body orbits. ... 00:00: ... three body problem is famous for being impossible to solve. But actually it's been solved ... 02:55: ... three body problem became the obsession for many great mathematicians - but over the ... 03:57: ... do we do it? Well, just because the three body problem for the most part has no useful analytic solution, approximate solutions ... 06:43: ... These are the only perfectly analytical solutions to the three body problem that exist. Place a low-mass object on any of these 5 orbits and it will ... 07:56: ... involving two masses bouncing back and forth in the center of a third body’s orbit. In the 90s Cris Moore discovered a stable figure-8 orbit of three ...
	2019-11-18: Can You Observe a Typical Universe? 16:26: ... the Goldilocks universe there would be life on almost every planetary body, even in this solar ...
	2019-09-30: How Many Universes Are There? 16:01: Here the IAU definition again: "A planet is a sun-orbiting body massive enough to be round and to have cleared it's orbit of debris". 16:16: ... difference in the physical nature and formation process of the body. ... 16:30: ... fact, whether or not a body clears its orbit depends strongly on where in the solar system it forms ... 16:55: ... may not relate to any scientifically interesting properties of the body. ... 17:33: The word planet is reserved exclusively for the 8 bodies of our solar system. 16:30: ... fact, whether or not a body clears its orbit depends strongly on where in the solar system it forms - the ... 16:01: Here the IAU definition again: "A planet is a sun-orbiting body massive enough to be round and to have cleared it's orbit of debris".
	2019-09-23: Is Pluto a Planet? 03:39: Between these two discoveries, four other bodies joined the planets. 08:42: ... 2006, the International Astronomical Union, the governing body of all astronomy names, designations, and definitions, met to finally ... 13:14: ... eight solar system bodies currently defined as planets certainly share plenty enough in common - ...
	2019-09-03: Is Earth's Magnetic Field Reversing? 07:27: ... fact any rotating body with a fluid conductor can produce such a field – the Earth, but also ...
	2019-06-06: The Alchemy of Neutron Star Collisions 00:00: ... stuff", refers to a mind-blowing idea that most atomic nuclei in our bodies were created in the nuclear furnaces and explosive deaths of stars that ... 02:47: ... for your biology in fact including the non-essential heavy elements your body mass is something like two parts per million colliding neutron star ...
	2019-04-24: No Dark Matter = Proof of Dark Matter? 00:03: ... obscuring effect on light passing through it if it were dark compact bodies like failed stars or stellar corpses or primordial black holes then we'd ...
	2019-04-03: The Edge of an Infinite Universe 17:58: ... bodies are pretty dependent on chemistry working normally, so there would be ...
	2019-03-28: Could the Universe End by Tearing Apart Every Atom? 06:20: ... crazier. As the rate of expansion increases and with no gravitational bodies left to resist the expansion, all points in space will eventually be ...
	2018-11-21: 'Oumuamua Is Not Aliens 03:14: Something is pushing the body outwards. 06:03: Oumuamua is weirdly shaped for a natural body. 03:14: Something is pushing the body outwards.
	2018-11-07: Why String Theory is Right 14:26: Uri Nation asks about the photons that mediate the magnetic field or the contact force between two bodies.
	2018-08-23: How Will the Universe End? 05:28: Heavier bodies, mostly neutron stars and black holes, sink towards the center. 07:06: If protons decay, black holes would be the only mass of bodies left in the universe after 10 to the power 40 years. 10:53: ... then quantum tunneling should allow small regions within larger bodies to collapse into black holes, which would then consume the rest of the ...
	2018-07-04: Will A New Neutrino Change The Standard Model? 09:38: ... the transition of muon to electron neutrinos as they travel through the body of the ...
	2018-06-13: What Survives Inside A Black Hole? 00:16: ... are weird, the result of absolute gravitational collapse of a massive body, a point of hypothetical infinite density surrounded by an event ...
	2018-04-25: Black Hole Swarms 01:49: Dense elements, like iron, sink to the centers of forming planetary bodies in a process called differentiation.
	2018-01-24: The End of the Habitable Zone 11:20: ... should be the Planck distribution, the same distribution as black body radiation from ... 11:45: Those photons would have a perfect black body spectrum. 11:20: ... should be the Planck distribution, the same distribution as black body radiation from ... 11:45: Those photons would have a perfect black body spectrum.
	2017-12-20: Extinction by Gamma-Ray Burst 10:50: Well, based on its brightness and variations in that brightness, the body is estimated to be 180 meters long and maybe 30 meters wide.
	2017-12-13: The Origin of 'Oumuamua, Our First Interstellar Visitor 02:19: And astronomers realized that this is consistent with an elongated body with a tumbling motion. 04:50: But perhaps Oumuamua got some sort of gravitational kick from an unknown planetary body.
	2017-11-22: Suicide Space Robots 06:50: These small icy bodies are thought to carry many secrets of our solar system's formation.
	2017-08-10: The One-Electron Universe 08:45: ... that every electron-- indeed every particle in our bodies, in everyone's bodies-- is the same particle separated from itself by ...
	2017-07-19: The Real Star Wars 07:09: ... nukes or other weapons of mass destruction in orbit or on a celestial body. ... 14:51: ... the ultraviolet catastrophe of the pre-Max Planck description of black body ...
	2017-05-03: Are We Living in an Ancestor Simulation? ft. Neil deGrasse Tyson 13:24: The particle may pass straight through your body, only depositing a bit of ultraviolet drink of radiation.
	2017-04-19: The Oh My God Particle 10:57: ... and Use of Outer Space, including the Moon and Other Celestial Bodies, or, the Outer Space Treaty, which the United States has ...
	2017-03-01: The Treasures of Trappist-1 07:35: Tidal force between two bodies is proportional to the product of the masses and the inverse cube of their distance.
	2017-02-22: The Eye of Sauron Reveals a Forming Solar System! 06:13: Fomalhaut B shows up as a bright orbital body in Hubble images.
	2017-02-15: Telescopes of Tomorrow 09:06: ... fluctuate due to the changing gravitational effect of nearby massive bodies. ...
	2016-11-09: Did Dark Energy Just Disappear? 13:47: Anyway, walking around in moon boots and lead bodysuits for your entire life is both unstylish, and it only helps bones and muscles.
	2016-07-27: The Quantum Experiment that Broke Reality 12:35: My pleasure-- a resonant frequency is when two orbiting bodies have orbital periods that form a neat ratio of small integers. 13:03: ... these bodies are closest together, they have the strongest gravitational pull on each ...
	2016-07-06: Juno to Reveal Jupiter's Violent Past 10:28: We recently talked about the origin of quantum theory with Max Planck's derivation of an equation to describe the black body spectrum. 11:14: This is due to its black body spectrum peaking in that yellowy green region. 10:28: We recently talked about the origin of quantum theory with Max Planck's derivation of an equation to describe the black body spectrum. 11:14: This is due to its black body spectrum peaking in that yellowy green region.
	2016-06-15: The Strange Universe of Gravitational Lensing 07:20: ... stellar bodies-- black holes, neutron stars, and brown dwarves-- occasionally pass in ... 07:31: This is how we've been able to count these otherwise near-invisible stellar bodies.
	2016-04-13: Will the Universe Expand Forever? 11:35: ... lot of you were interested to know where the actual elements in our bodies came from and where the supernovae that produce those elements and their ...
	2016-04-06: We Are Star Stuff 00:00: ... Carl Sagan said that we are "starstuff." Most of the atoms in our body were forged in violent stellar alchemy and spread through the galaxy in ... 02:25: ... single one of them, the actual physical stuff of your body, of the Earth, of everything you can see, was at one point forged in one ... 02:37: ... start with the simplest, hydrogen. Your body is up to 60% water, H2O, which makes you around 40% hydrogen by number ... 07:49: All of the main ingredients of your own body were fusion shells in past supernovae.
	2016-03-16: Why is the Earth Round and the Milky Way Flat? 06:50: It turns out that any body larger than several kilometers in diameter will form a sphere.
	2016-02-17: Planet X Discovered?? + Challenge Winners! 00:35: ... planet partly due to Brown's discovery of Eris, a distant planetary body that's larger than ...
	2016-02-03: Will Mars or Venus Kill You First? 02:39: See, this extremely low pressure is going to do horrible things to your body. 04:43: The steady bombardment by high-speed atomic nuclei smashing through our bodies will certainly damaged cells and DNA.
	2015-12-16: The Higgs Mechanism Explained 00:14: ... PLAYING] We saw in a previous episode that most of the mass in your body, in fact, the mass of anything that's made of atoms, doesn't come from ...
	2015-12-09: How to Build a Black Hole 11:54: ... when we landed Philae probe on a comet, landing on irregularly shaped bodies, with very weak gravity, is extremely ...
	2015-10-22: Have Gravitational Waves Been Discovered?!? 03:03: If one passed through your body, you'd become taller and thinner, then shorter and fatter, then taller and thinner, et cetera, until it passed by. 09:40: Large bodies like asteroids are rare enough in interstellar space that hitting one is very unlikely.
	2015-08-19: Do Events Inside Black Holes Happen? 13:56: What you are mistaking for tides is seiching in those bodies of water, namely resonant oscillations of the water due to the shape of the lakes.
	2015-08-12: Challenge: Which Particle Wins This Race? 00:36: That sphere is not rotating, and it's not orbiting any other larger bodies. 00:40: For simplicity, I'm going to refer to this sphere as a planet, but it could be any other massive body.
	2015-08-05: What Physics Teachers Get Wrong About Tides! 06:21: See, unlike the oceans, a single lake is not a contiguous, planet sized body of water. 06:48: ... same is true for any enclosed body of liquid-- a swimming pool, a bathtub, a human body-- which is ...
	2015-05-27: Habitable Exoplanets Debunked! 03:46: You can measure the atmosphere of an exoplanet, but not if that exoplanet is an Earth-sized rocky body in a star's habitable zone. 08:17: Dan Cattell asked whether the human body really does lose a little bit of mass when it dies. 08:23: There's some matter exchanged just because the human body is porous. 08:26: ... from an e equals mc squared perspective, your drop in body temperature alone would mean there's less thermal energy contributing to ...
	2015-05-13: 9 NASA Technologies Shaping YOUR Future 04:45: Inside a space suit, a rise in core body temperature from overexertion could be incredibly dangerous since there's no easy way to get that heat out.
	2015-05-06: Should the First Mars Mission Be All Women? 09:04: ... might be fluid redistribution in the body, and you might get more bone leeching in your neck because there's less ...
	2015-04-29: What's the Most Realistic Artificial Gravity in Sci-Fi? 01:44: From an overhead perspective, your body wants to fly off in a tangent, not move in a circle.
	2015-04-15: Could NASA Start the Zombie Apocalypse? 03:57: It weakens the body's immune response. 05:18: At that point, the total amount of gas that you would have released would have been a non-trivial fraction of your body mass. 03:57: It weakens the body's immune response.
	2015-04-08: Could You Fart Your Way to the Moon? 02:12: Flatulence is just throwing gas, as opposed to baseballs or rocket fuel, out of your body.
	2015-03-25: Cosmic Microwave Background Explained 01:56: ... spectrum or really an idealization of a thermal spectrum called a black body ...
	2015-02-11: What Planet Is Super Mario World? 04:28: What you find is that all the major rocky bodies-- that means the moon, Mars, Venus, Mercury-- all of them have smaller g values than Earth does.

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