How did the universe begin? And what came before the Big Bang? Cosmologists have asked these questions ever since discovering that our universe is expanding. The answers aren't easy to determine. The beginning of the cosmos ...
Astronomy
Jan 25, 2016
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ESA's Planck satellite has revealed that the first stars in the Universe started forming later than previous observations of the Cosmic Microwave Background indicated. This new analysis also shows that these stars were the ...
Astronomy
Aug 31, 2016
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(Phys.org) —Cosmologists have made the most sensitive and precise measurements yet of the polarization of the cosmic microwave background.
Astronomy
Oct 21, 2014
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An international team of astronomers today (29 June) released a gazetteer of the hidden universe, which reveals the unseen sources of energy found over the last 12 billion years of cosmic history. Professor Haley Gomez of ...
Astronomy
Jun 29, 2016
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With the combined power of NASA's Spitzer and Hubble space telescopes as well as a cosmic magnification effect, a team of astronomers led by Wei Zheng of The Johns Hopkins University has spotted what could be the most distant ...
Astronomy
Sep 19, 2012
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(PhysOrg.com) -- Using the amplifying power of a cosmic gravitational lens, astronomers have discovered a distant galaxy whose stars were born unexpectedly early in cosmic history. This result sheds new light on the formation ...
Astronomy
Apr 12, 2011
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Scientists have developed a technique to use quasars – powerful sources driven by supermassive black holes at the centre of galaxies – to study the universe's history and composition. To demonstrate the new method, based ...
Astronomy
Dec 4, 2015
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(Phys.org) —How much light has been emitted by all galaxies since the cosmos began? After all, every photon (particle of light) from ultraviolet to far infrared wavelengths ever radiated by all galaxies that ever existed ...
Astronomy
May 24, 2013
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To build a planet you need lots of rubble and that means lots of heavy elements – stuff more massive than atoms of hydrogen and helium. The elemental composition of the collapsing nebula that gave birth to the Sun and the ...
Astronomy
Aug 31, 2012
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(Phys.org)—Radio-astronomical observations of a distant galaxy indicate that the ratio of the proton's mass to that of the electron has hardly changed over cosmic history. This fundamental constant of nature has changed ...
Astronomy
Dec 13, 2012
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