Скачать или смотреть TIME DILATION NEAR BLACK HOLES | EXPLAINS ASTROPHYSICISTS [ PART-1 ]

original video:- ( StarTalk )    • Black Hole Bonanza: StarTalk Live! With Ne...  
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Janna J. Levin (born 1967) is an American theoretical cosmologist and a professor of physics and astronomy at Barnard College. She earned a Bachelor of Arts in astronomy and physics with a concentration in philosophy at Barnard College in 1988 and a PhD in theoretical physics at the Massachusetts Institute of Technology in 1993.[1] Much of her work deals with looking for evidence to support the proposal that our universe might be finite in size due to its having a nontrivial topology.[2] Other work includes black holes and chaos theory. She joined the faculty at Barnard College in January 2004 and is currently the Claire Tow Professor of Physics and Astronomy.
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Neil deGrasse Tyson is an American astrophysicist, author, and science communicator. Tyson studied at Harvard University, the University of Texas at Austin, and Columbia University. From 1991 to 1994, he was a postdoctoral research associate at Princeton University. In 1994, he joined the Hayden Planetarium as a staff scientist and the Princeton faculty as a visiting research scientist and lecturer. In 1996, he became director of the planetarium and oversaw its $210 million reconstruction project, which was completed in 2000. Since 1996, he has been the director of the Hayden Planetarium at the Rose Center for Earth and Space in New York City. The center is part of the American Museum of Natural History, where Tyson founded the Department of Astrophysics in 1997 and has been a research associate in the department since 2003.
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