
20221012: The REAL Possibility of Mapping Alien Planets!
 06:05: ... is the “flagship” model, in which a single craft with a 12 meter telescope is sent to do the work. The second is the string ...
 07:45: ... space agency sent the IKAROS probe to Venus using a 20 meter solar sail, and plenty more solar sails missions are in the ...


20220928: Why Is 1/137 One of the Greatest Unsolved Problems In Physics?
 03:28: ... charge of the electron is in Couloumbs, the speed of light in meters per second, vacuum permittivity and Planck's constant also have their ...
 09:47: Transmit, say, the value for the speed of light  299,792,458 m/s, and you also have to explain what a meter and a second are.


20220921: Science of the James Webb Telescope Explained!
 02:15: ... has a 2.4 meter diameter mirror  the NGST had to be much bigger  8m diameter to make ...


20220727: How Many States Of Matter Are There?
 10:14: But if you increase the peopledensity to around 5 per square meter or more, a phase transition occurs.


20220622: Is Interstellar Travel Impossible?
 11:42: ... against this radiation at 20% c, as would be a shield of water a meter thick  perhaps the best option because you’re carrying that water ...
 12:04: If you want to travel at speeds closer to that of light, you need up to several meters of titanium or tens of meters of water.
 13:09: ... meterthick shell of water around the entire ship would do the trick, but would add ...


20220504: Space DOES NOT Expand Everywhere
 09:16: ... to regrid it at any point. What was once a millimeter might become a meter and the meter becomes a kilometer, but we can just redefine everything ...


20220308: Is the Proxima System Our Best Hope For Another Earth?
 13:19: ... building and planning a new generation of giant telescope  30 to 100 meters in diameter, which should be sensitive enough to detect emission lines ...


20220223: Are Cosmic Strings Cracks in the Universe?
 07:33: ... of energy, which gives it the mass of the planet Mars for every 100 meters of ...


20220210: The Nature of Space and Time AMA
 00:03: ... in to a higher density inside that uh you region there are more meters per meter in the absence of the gravitational field now the other ...


20210915: Neutron Stars: The Most Extreme Objects in the Universe
 06:38: ... we’ve gone down a few hundred meters, we see nuclei that can’t even exist outside a neutron star. ...


20210616: Can Space Be Infinitely Divided?
 00:00: ... times and they’re a single Plancklength apart  1.6x10^35 meters. Surely we can keep going  .8, .4, .2 x10^35 m? Bizarrely, ...


20210609: Are We Running Out of Space Above Earth?
 15:16: Two hundredths of a milligram is giant compared to the 1.6x10^35 meters of the Planck length or the 5x10^44 seconds of the Planck time.


20210525: What If (Tiny) Black Holes Are Everywhere?
 06:41: Such a black hole would have an event horizon of around 10^35 meters  the Planck length.


20200824: Can Future Colliders Break the Standard Model?
 02:53: Its four meter ring collided electrons and positrons.
 03:19: The Americans soon followed up with a 12 meter electronelectron collider with a similar luminosity to VEP1 but higher energies than even the AdA.
 17:04: Well space isn’t really empty  there’s an average density of one atom per cubic meter, so technically sound is possible.


20200728: What is a Theory of Everything: Livestream
 00:00: ... circular tunnel on the border of france and switzerland 100 meters underground the large hadron collider and we accelerate protons to 13 ...


20200428: Space Time Livestream: Ask Matt Anything
 00:00: ... because we define the length of the second and we define you know the meter and so we end up with a certain number of meters per second but I like ...


20200422: Will Wormholes Allow Fast Interstellar Travel?
 15:35: ... between 1 particle per cubic centimeter and 1 particle per cubic meter. It's vacuumy enough to kill you fast, but there's enough of the stuff ...


20200106: How To Detect a Neutrino
 03:20: ... (𝘴𝘰𝘧𝘵 𝘢𝘯𝘥 𝘴𝘱𝘢𝘤𝘦𝘺 𝘢𝘨𝘢𝘪𝘯) ♪ The beam then passes through several hundred meters of solid rock, which blocks the muons, ♪ ♪ The beam then passes through ...


20190930: How Many Universes Are There?
 03:59: Every 10^32 seconds one cubic meter of volume becomes 10^78 cubic meters, which is approximately the volume of our entire universe.


20190923: Is Pluto a Planet?
 17:24: A couple of meters of Martian rock above your head is plenty to protect against space radiation and micrometeorites.


20190916: Could We Terraform Mars?
 07:12: We need about 10,000 kg of material per square meter to duplicate Earth’s atmospheric pressure.
 07:35: So to get 10 tons of CO2 for every square meter on the surface of Mars you’d have to dig down over 10 meters – across the entire planet!
 09:42: ... ice cap water would cover the entire surface to about 30 meters – which is not enough to start a proper water cycle or have oceans, but ...
 14:28: ... we wanted to cover, say, 10% of the Martian surface with a 300 meter tall worldhouse, it'd require several orders of magnitude less material ...


20190819: What Happened Before the Big Bang?
 09:27: A millionth of a gram in a space 10^(35) meters across should do the trick.


20190812: Exploring Arecibo in VR 180
 01:02: ... aligned to create that spherical surface as I said it's over 300 meters in diameter That's a surface area of 26 football fields And no you can't ...


20190701: Thorium and the Future of Nuclear Energy
 00:00: ... too cheap to meter That was the promise of nuclear power in the 1950s at least according to ...


20190620: 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 ...


20190606: The Alchemy of Neutron Star Collisions
 13:02: ... out the density of the universe is roughly one hydrogen atom per square meter the universe is now around 1,100 times larger than it was then so can I ...


20190313: Will You Travel to Space?
 05:59: Unity is dropped at 15,000 meters by its carrier, White Night, after which it blasts it's rocket engine sending it into a suborbital flight.


20190207: Sound Waves from the Beginning of Time
 06:02: The speed of sound dropped from half the speed of light to only hundreds of meters per second.


20181220: Why String Theory is Wrong
 03:43: Shrink it down to around 10 to the power of negative thirtieth of a meter, so it's only visible to things equally miniscule.


20181121: 'Oumuamua Is Not Aliens
 01:53: It appears to be a few hundred meters long but only a few tens of meters cross.
 05:09: ... and Loeb calculate that a 50 meter wide sheet less than a millimeter thick and made of a highly reflective ...


20181010: Computing a Universe Simulation
 04:58: So our Bekenstein bound hard drive needs to be roughly 4 by 10 to the power of 80 Planck areas, corresponding to 40 billion square meters.


20180920: Quantum Gravity and the Hardest Problem in Physics
 05:57: ... better than a Planck length around 10 to the power of negative 35 of a meter, the amount of energy you would need to put into that region of space ...


20180912: How Much Information is in the Universe?
 02:48: ... measure of distance, at around 1.6 times 10 to the negative 35 meters. ...
 07:54: Its event horizon is around 12 billion meters, giving it a surface area of 10 to the power of 90 to 10 to the power of 91 Planck units.


20180627: How Asteroid Mining Will Save Earth
 02:01: They range from a meter or so to hundreds of kilometers in diameter, and they live primarily in the asteroid belt between Mars and Jupiter.


20180516: Noether's Theorem and The Symmetries of Reality
 11:00: It has a 35square meter collecting area, compared to Gaia's 0.7 square meters.


20180404: The Unruh Effect
 09:38: You need to accelerate at a rate of 10 to the power of 20 meters per second squared to increase the temperature via a single degree Kelvin.


20180321: Scientists Have Detected the First Stars
 08:13: Then, half mv squared gives us its velocity, around 80 meters per second.


20180228: The Trebuchet Challenge
 03:51: As Archimedes once said, "give me a lever and a place to stand, and I will move the earth," or hurl a 90kilogram stone over 300 meters.
 06:54: Let's say you drop a fiveton counterweight from a height of eight meters above the ground.
 07:10: ... counterweight swings to a lowest point 1 meter above the ground and continues its arc, ultimately rising to a height of ...
 07:20: Meanwhile, the stone travels 300 meters to strike the fortress wall 15 meters above the ground.


20180221: The Death of the Sun
 11:46: I suppose you'd have preferred some sort of device that can launch a 90 kilogram stone over 300 meters.


20180110: What Do Stars Sound Like?
 04:45: At the same time, gas moves vertically in and out during the same oscillation, reaching velocities of 0.1 meters per second.


20171220: Extinction by GammaRay 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.
 10:58: Now, assuming an albedo or reflectivity of 0.1, that gives it a volume of around 130,000 cubic meters.
 11:06: A typical asteroidal density is 2,000 kilograms per cubic meter.


20171213: The Origin of 'Oumuamua, Our First Interstellar Visitor
 01:59: ... like a cigar or the monolith from "2001: A Space Odyssey." Hundreds of meters long, it's size and shape can't be determined directly from the ...
 02:39: That suggests the surface to at least one meter depth is rocky like an asteroid rather than icy like a comet.


20171122: Suicide Space Robots
 07:21: ... nearly five tons of TNT in kinetic impact energy and forming a crater 30 meters ...


20171102: The Vacuum Catastrophe
 10:18: The average density in the filaments is maybe 20 baryons per cubic meter.


20170928: Are the Fundamental Constants Changing?
 02:03: Its value today is 299,792,458 meters per second in a vacuum.
 02:31: The meter is officially defined as the distance light travels in one 299,792,458th of a second.


20170920: The Future of Space Telescopes
 02:50: ... starshade will be up to 50 meters in diameter and hover 80,000 kilometers in front of the telescope, ...
 06:08: Imagine an opaque disk of 100 meters to a kilometer in diameter, suspended in front of a satellite detector.
 09:11: Scientists could expand the aperture to tens of meter in diameter.


20170824: First Detection of Life
 09:03: ... gigantic 6.5 meter diameter mirror and incredibly sensitive infrared spectrograph, coupled ...


20170419: The Oh My God Particle
 05:33: At the lowest energies, the cosmos flings one particle every second per square meter of the Earth's surface.


20170405: Telescopes on the Moon
 06:06: Grind it into shape and coat it with aluminum, and it may be possible to build a 50 meter mirror on the moon.
 06:41: It spins a six meter dish of mercury at 8.5 revolutions per minute, creating the cheapest telescope of that size ever constructed.
 07:49: Lower gravity could facilitate the formation of large liquid mirrors, maybe up to 100 meters across.


20170215: Telescopes of Tomorrow
 00:57: With a diameter of 6.5 meters, compared to Hubble's 2.4, it has over five times Hubble's collecting area.
 05:02: Together, they provide an effective aperture, 24.5 meters in diameter, and a collecting area over 80 times Hubble's and nearly 15 times Webb's.
 07:48: The Large Synoptic Survey Telescope's primary mirror spans 8.4 meters 3 and 1/2 times larger than Hubble's.


20161130: Pilot Wave Theory and Quantum Realism
 14:51: ... below that crust, there's a region centimeters to meters deep in which you have significant impurities of electrons and protons ...


20160504: Will Starshot's Insterstellar Journey Succeed?
 03:51: ... Starshot will be comprised of a sail around a meter in diameter that's made of an advanced metamaterial a nanofabricated ...


20160330: Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners!
 04:16: And it 6.65 by 10 to the minus 29 meters squared.
 05:57: 46.6 billion light years in radius now, translates to 42.3 million light years then, which is a volume of 2.7 times 10 to the 71 cubic meters.
 06:11: ... evenly and we get that there were 200 million electrons in every cubic meter at the moment of ...
 06:21: That's way up from the 0.2 electrons per cubic meter that we find now.
 07:07: ... we say the crosssectional surface area of the column is a square meter, then each 1meter length of the column has a fraction blocked equal to ...


20160316: Why is the Earth Round and the Milky Way Flat?
 07:55: ... the upward acceleration we feel due to the Earth's rotation is 0.03 meters per second squared, compared to 9.8 meters per second squared due to ...


20160203: Will Mars or Venus Kill You First?
 05:49: ... you can actually shield against a coronal mass ejection with around a 1 meter thickness of water or potentially food, human waste products, ...


20151125: 100 Years of Relativity + Challenge Winners!
 03:53: ... the average acceleration comes out to around 10 to the power of minus 9 meters per second squared or around one ten billionth of Earth's surface ...
 04:06: Our spacecraft is hovering 325 meters from the center of mass of Apophis.


20151118: 5 Ways to Stop a Killer Asteroid
 01:25: A rock less than 10 meters in diameter vaporizes harmlessly in the atmosphere.
 01:40: Meteors 20100 meters in size have the kinetic energy equivalent of a thermonuclear explosion.
 01:54: For a rock around 500 meters in diameter, the strike will have the energy equivalent of all currently operational nuclear weapons in the world.
 03:14: ... are a couple of 500 meter bad boys that have a very small chance of hitting in the late 2100s, and ...
 07:27: ... simulations of HAIV team, a one megaton Hbomb should break up a 500 meter asteroid nicely, although it depends on the structure of the ...


20150805: What Physics Teachers Get Wrong About Tides!
 07:45: Second, in the simple model of a water world Earth, the math says that the water level should vary by about 3/4 of a meter between high and low tide.
 07:54: But some places see smaller tides than this while other places, like the Bay of Fundy in Canada, have tidal swings of over 10 meters each day.


20150603: Is Gravity An Illusion?
 06:32: It's really accelerating downward at 9.8 meters per second squared.


20150506: Should the First Mars Mission Be All Women?
 08:21: So go 9.8 meters per second per second acceleration in one direction.


20150429: What's the Most Realistic Artificial Gravity in SciFi?
 03:05: Let's start with the iconic scene of Frank Poole jogging around the rotating command module in "2001: A Space Odyssey." Poole's height is 1.8 meters.
 03:12: Using him as a ruler, the radius of the module he's running in looks to be about 8 meters, give or take.
 03:17: ... produce 1 Earth g of effective gravity at its surface or 10 meters per second squared, our earlier formula says the ring would need to ...
 04:14: Poole himself would feel 20% heavier at his leisurely 2 meters per second jogging speed and feel pressed down into the ground.
 04:35: For example, any time you stand up from a chair, your head has an upward speed of about 1 meter per second.


20150408: Could You Fart Your Way to the Moon?
 03:17: But I couldn't get one, so I used the 3 meters per second value I kept seeing on the internet.
 03:38: That's 15 centimeters an hour, 3.7 meters per day, 26 meters in a week, or 1.3 kilometers per year.
 03:57: Suppose you were stranded at rest 10 meters away from the air lock door on the ISS.
 04:21: ... the description used high speed photography to get an answer closer to 4 meters per second, right around my estimate for the speed of a ...
 04:42: Mine was in the same 3 to 4 meter per second range we've seen all episode.
 04:59: About 500 to 700 times higher recoil velocity, a little over 77 meters per hour, or enough to get you back to the ISS in under eight minutes.


20150401: Is the Moon in Majora’s Mask a Black Hole?
 03:45: I've worked out the algebra using that MatPat's measurement of a mere 30ish meters for the radius of Termina's moon.


20150318: Can A Starfox Barrel Roll Work In Space?
 05:42: ... there are still lots of unanswered questions, including what a space meter is, which is apparently the official unit of measurement in the "Star ...


20150311: What Will Destroy Planet Earth?
 03:07: All they changed from one initial set up to another was Mercury's current position by about a meter.


20150218: Is It Irrational to Believe in Aliens?
 07:11: The Gentleman Physicist points out that Super Mario World could be a platform accelerating through space with rockets at 70 meters per second squared.


20150211: What Planet Is Super Mario World?
 00:26: Now on Earth, an object rising straight upward will lose 9.8 meters per second of its speed each second.
 00:32: Likewise, a falling object will gain 940 meters per second of extra speed each second.
 00:41: One second later, it's moving at 10 meters per second.
 00:44: Two seconds later, 20 meters per second.
 00:58: ... rate, around 10 meters per second per second, or 10 meters per second squared, is called the ...
 01:50: Careful internet research, which you can also find in the description, reveals that Mario's official stature is 1.55 meters, or about 5'1" tall.
 02:17: Multiply that by his height of 1.55 meters, and you find that his jump height is almost 3 and 1/2 meters.
 02:40: If we set h to 3.5 meters and t to 0.3 seconds, we get a final g value of around 78 meters per second per second, or almost 8 Earth g's.
 03:43: If Mario were on Earth, he would have a takeout speed of over 50 miles an hour and be able to jump about 28 meters, or over 90 feet.
