How can we measure the historical climate of the universe?

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system

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Climatologists and geologists have developed a number of ways to estimate the temperature on Earth going back a very long way in Earth’s history – but astronomers would like to know the historic temperature of the entire universe – going back more than 13 billion years. George Becker, a fellow at the Kavli Institute for Cosmology, uses the light from Quasars to read off the climatological history of the universe...

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or [chapter podcast=3389 track=11.07.24/Naked_Scientists_Show_11.07.24_8741.mp3] Listen to it now[/chapter] or [download as MP3]
« Last Edit: 26/07/2011 23:01:02 by _system »

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Offline Mr. Data

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How can we measure the historical climate of the universe?
« Reply #1 on: 28/07/2011 18:04:48 »
Cosmic bruises also tell us the story of the universes climate. It is possible with this evidence, to assume the universe was frozen as a prestate to the big bang.

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Offline MarcS

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How can we measure the historical climate of the universe?
« Reply #2 on: 29/07/2011 19:43:07 »
If the gas in the intergalactic medium is highly ionized why does it have an absorption spectrum?  If the absorption comes from a photon of a specific wavelength being absorbed by an atom by kicking an electron up to a higher state then wouldn't an ionized hydrogen or helium atom not be able to absorb a photon since they have no electrons?