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Sean Carroll Answers Your Questions - Ask the Experts #19

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SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5 Sean Carroll, theoretical physicist at Caltech and author of Eternity to Here: The Quest for the Ultimate Theory of Time, answers your questions! Questions: 1. If we did travel at 99.9% the speed if light what would it look like? And i read that we could create something like a warp drive to travel without breaking the laws of physics is this true? —Tyler Claudio 2. Micheal said in video 3 that if you traveled over the speed of light you would go back in time but a human cant go the speed of light so could a object or machine could go faster then the speed of light would it appear in the past? —Cam Nelson 3. Is there a timeless zone in the universe? —Santy Arcusa Find out more about Sean: goo.gl/dJrgMp ------------ Leave your questions in the comment section or ask it in a video response. An expert will be back to answer 3 more of your questions. Thanks for watching!
04:52
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SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5 Caleb Scharf, Director of Astrobiology at Columbia University, answers your questions! Questions: 1. If you were standing near the event horizon of a black hole and someone pointed a beam of gamma rays at you? Would they remain gamma rays or turn into something else? —ciaran mccormick 2. If the universe is expanding, and galaxies are moving farther apart, then why is it that the Milky way and Andromeda galaxies are on a collision course? —theinsanity3 3. Why does the planets, astroids (in general) in our solar system orbit the sun in a flat orbit with all the planet in the same plane ? the same thing with the solar systems orbiting galaxies? —yassine Laarichi Find out more about Caleb: goo.gl/1RnC9 ------------ Leave your questions in the comment section or ask it in a video response. An expert will be back to answer 3 more of your questions. Thanks for watching!
05:27
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SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5 George Musser, contributing Editor at Scientific American magazine, answers your questions! Questions: 1.sl270703: Lets say im an alien on a ship 65million or more light years away. using a telescope i look at earth and i see dinosaurs living their daily lives. If my ship started traveling towards earth near the speed of light. Would I see the dinosaurs moving faster? fast forwarded? 2. lordv27: If all movement is relative, how can there be a speed limit? In order to measure speed you have to measure it against something. So... what is the speed limit measured against? 3. Shaido666: If a black holes event horizon gets bigger every time its density gets bigger, ie. it "absorbs" mass, why hasn't the whole universe collapsed into an enormous black hole yet? Shouldn't this kind of expanding black hole be getting bigger exponentially? And will this be the end of our universe and possibly the birth of a new one (or where ours began, a big bang)? Find out more about George: http://goo.gl/S5voS GET George's book: http://goo.gl/lBi6Y ------------ Leave your questions in the comment section or ask it in a video response. An expert will be back to answer 3 more of your questions. Thanks for watching!
07:34
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SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5 Gabe Perez-Giz, research scientist at New York University's Center for Cosmology & Particle Physics, answers your questions! Questions: 1. What is preventing light from going faster than 300 000 km/s? 2.If photon has rest mass = 0 , then why does black hole pull it in? 3. When black holes absorb matter, the matter's velocity accelerates into the black hole because of stronger and stronger gravity. But how about light? The speed of light is the limit, so what happens then? :-) Find out more about Gabe: http://goo.gl/yYSCa WATCH Gabe's lecture on black holes at New York University: http://goo.gl/garz2 ------------ Leave your questions in the comment section or ask it in a video response. An expert will be back to answer 3 more of your questions. Thanks for watching!
04:37
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Leave your questions in the comment section. The question with the most "likes" will be answered in the next video, along with two additional questions. Thanks for watching! ------------ Lawrence Krauss is the director of the Origins Project at Arizona State University, a theoretical physicist and author of "A Universe from Nothing." http://krauss.faculty.asu.edu/books/a-universe-from-nothing/ ------------ SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5
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Guest narrator Sean Carroll of Caltech describes dark energy and the acceleration of the universe, the discovery of which was awarded the 2011 Nobel Prize in Physics on October 4th. Tweet it - http://bit.ly/oCD2jo Facebook it - http://on.fb.me/oagPm3 minutephysics is now on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Music by Nathaniel Schroeder youtube: http://bit.ly/pakJLE myspace: http://mysp.ac/qtmZQj Portuguese translation by Igor Zolnerkevic
08:08
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SUBSCRIBE, future astronauts! http://goo.gl/bRbj4 Watch more episodes: http://goo.gl/9MNo5 Matthew Kleban, professor of physics at New York University, answers your questions! Questions: 1.If the multiverse theory is true and other universes truly exist, and let's say we had the technology to escape our universe and go into interuniversal space...since time only exists because of the big bang and there are other "times" in different universes same as our own then what about the area in between the universes does time exist there? 2.With the theory,or fact that the universe is expanding how does science determine the edge of the universe? And once the energy/forces which drives the expansion is spent and the universe begins to shrink what is left in it's place? The same void/nothingness before expansion? Thank you. Find out more about Matthew: http://goo.gl/r4ObH WATCH Matthew's lecture on string theory at the Canadian Institute for Theoretical Astrophysics: http://goo.gl/WjNNW ------------ Leave your questions in the comment section or ask it in a video response. An expert will be back to answer 3 more of your questions. Thanks for watching!