Exact solutions in general relativity
A de Sitter universe is a cosmological solution to the Einstein field equations of general relativity, named after Willem de Sitter. It models the universe as spatially flat and neglects ordinary matter, so the dynamics of the universe are dominated by the cosmological constant, thought to correspond to dark energy in our universe or the inflaton field in the early universe. According to the models of inflation and current observations of the accelerating universe, the concordance models of physical cosmology are converging on a consistent model where our universe was best described as a de Sitter universe at about a time seconds after the fiducial Big Bang singularity, and far into the future. (Wikipedia).
Do We Live in a Special Part of the Universe?
In ancient times, astronomers and philosophers thought that the Earth was the center of the Universe. We know that’s wrong, but is there anything special about where we live? Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Tw
From playlist Cosmology
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Are there any mementos from when the Earth was born? ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Cosmos: http://bit.ly/NG-Cosmos About Cosmos: A Spacetime Odyssey: Hosted by renowned astrophysicist Neil deGrasse Tyson, COSMOS will explore how we discovered the laws of nature and
From playlist Outer Space | National Geographic
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From playlist Debunks/Discussions/Debates
Life in the Dewdrop | Cosmos: A Spacetime Odyssey
Explore the multitudes of life within just one dewdrop. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Cosmos: http://bit.ly/NG-Cosmos About Cosmos: A Spacetime Odyssey: Hosted by renowned astrophysicist Neil deGrasse Tyson, COSMOS will explore how we discovered the laws of nature
From playlist Outer Space | National Geographic
The Clean Room: Inside Look | Cosmos: A Spacetime Odyssey
The makers of Cosmos give you a sneak peak into "The Clean Room." ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Cosmos: http://bit.ly/NG-Cosmos About Cosmos: A Spacetime Odyssey: Hosted by renowned astrophysicist Neil deGrasse Tyson, COSMOS will explore how we discovered the law
From playlist Outer Space | National Geographic
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From playlist Earth's place in Solar System - Jaxa
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The visible cosmos is all made of the same elements. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Cosmos: http://bit.ly/NG-Cosmos About Cosmos: A Spacetime Odyssey: Hosted by renowned astrophysicist Neil deGrasse Tyson, COSMOS will explore how we discovered the laws of nature and
From playlist Outer Space | National Geographic
Aspect of De Sitter Space (Lecture - 01) by Dionysios Anninos
Infosys-ICTS String Theory Lectures Aspect of De Sitter Space Speaker: Dionysios Anninos (King's College London, United Kingdom) Date: 29 October 2018, 11:00 to 01 November 2018, 11:00 Venue: Madhava Lecture Hall, ICTS campus We overview some aspects of asymptotically de Sitter space
From playlist Infosys-ICTS String Theory Lectures
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From playlist Natural Sciences
Quantum Circuit Cosmology - S. Carroll - Workshop 1 - CEB T3 2018
Sean Carroll (California Institute) / 17.09.2018 Quantum Circuit Cosmology ---------------------------------- Vous pouvez nous rejoindre sur les réseaux sociaux pour suivre nos actualités. Facebook : https://www.facebook.com/InstitutHenriPoincare/ Twitter : https://twitter.com/InHenriPo
From playlist 2018 - T3 - Analytics, Inference, and Computation in Cosmology
Aspect of De Sitter Space (Lecture - 03) by Dionysios Anninos
Infosys-ICTS String Theory Lectures Aspect of De Sitter Space Speaker: Dionysios Anninos (King's College London, United Kingdom) Date: 29 October 2018, 11:00 to 01 November 2018, 11:00 Venue: Madhava Lecture Hall, ICTS campus We overview some aspects of asymptotically de Sitter space
From playlist Infosys-ICTS String Theory Lectures
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From playlist MinutePhysics
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From playlist Earth's place in Solar System - Jaxa
Aspects of Eternal Inflation, part 4 - Leonard Susskind
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From playlist PiTP 2011
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From playlist PiTP 2011
Why do some scientists believe that our universe is a hologram?
In this video, I explain why some scientists believe that our universe is a hologram and we really live in the 2-dimensional projection of a higher dimensional space. First, I explain just what physicists mean by the "holographic principle." The holographic principle says that the degrees
From playlist Physics
The Edge of an Infinite Universe
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Have you ever asked “what is beyond the edge of the universe?” And have you ever been told that an infinite universe that has no edge? You were told wrong.
From playlist What Fraser's watching
Aspect of De Sitter Space (Lecture - 02) by Dionysios Anninos
Infosys-ICTS String Theory Lectures Aspect of De Sitter Space Speaker: Dionysios Anninos (King's College London, United Kingdom) Date: 29 October 2018, 11:00 to 01 November 2018, 11:00 Venue: Madhava Lecture Hall, ICTS campus We overview some aspects of asymptotically de Sitter space
From playlist Infosys-ICTS String Theory Lectures
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From playlist Science Unplugged: Big Ideas