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The Universe
The Universe is by definition everything that physically exists in space and time. It originated in the Big Bang 13.7 billion years ago. The radius of the Universe is at least 78 billion light years. That is the distance to the point from which a photon of light originated which is now reaching us after traveling for 13.7 billion years. However the Universe could be far larger. There is no limit to the speed at which space itself may expand, so the Universe may stretch far beyond the Hubble horizon expanding away from us faster than the speed of light. It is also conjectured that our Universe may be only one of 10500 other universes which may have totally different laws of nature and which are collectively called a multiverse.
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Featured news
Three Galaxies Locked in a Gravitational...
European Space Agency (March 2, 2009) – A new Hubble image shows three galaxies locked in a gravitational tug-of-war that may result in the eventual demise of one of... More »
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Featured news
Researchers Interpret Asymmetry in Early...
Caltech, Pasadena, CA (Dec. 16, 2008) – The Big Bang is widely considered to have obliterated any trace of what came before. Now, astrophysicists at the California Institute of... More »
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Featured news
Mysterious Space Blob Discovered at Cosmic Dawn
Carnegie Institution for Science (Apr. 23, 2009) – Using information from a suite of telescopes, astronomers have discovered a mysterious, giant object that existed at a time... More »
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Featured news
Herschel and Planck Share Ride to Space
PASADENA, Calif. (May 5, 2009) – Two missions to study the cosmos, Herschel and Planck, are scheduled to blast into space May 14 aboard the same Ariane 5 rocket from the Guiana... More »
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Featured news
Researchers propose new way to reproduce a...
Dartmouth College (Aug. 22, 2009) – Despite their popularity in the science fiction genre, there is much to be learned about black holes, the mysterious regions in space... More »
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Featured news
Galactic particle accelerator located
ETH, Zurich (Sep. 14, 2009) – An unprecedented measuring campaign has succeeded in precisely defining the place of origin of high-energy gamma radiation in the galaxy Messier... More »
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Featured news
LIGO Listens for Gravitational Echoes of the...
Caltech, Pasadena, CA (Aug. 19. 2009) – An investigation by the LIGO (Laser Interferometer Gravitational-Wave Observatory) Scientific Collaboration and the Virgo Collaboration... More »
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Featured video
Carl Sagan "Pale Blue Dot"
From the source: From the Carl Sagan's Pale Blue Dot. There are several different versions of "The Pale Blue Dot" on-line. The actual words were taken from Carl... More »
Is Our Universe at Home Within a Larger Universe?
Last Updated on 2010-03-29 00:00:00
BLOOMINGTON, Ind. (April 5, 2010) – Could our universe be located within the interior of a wormhole which itself is part of a black hole that lies within a much larger... More »
Astronomers: The end is nigher than we expected
Last Updated on 2010-01-27 00:00:00
CANBERRA, AUSTRALIA (Jan. 26, 2010) – Cars run out of petrol, stars run out of fuel and galaxies collapse into black holes. As they do, the universe and everything in it is... More »
