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How was the Universe Created?

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Author Topic: How was the Universe Created?  (Read 2903 times)
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Baphomet
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« Reply #90 on: August 17, 2008, 03:22:49 am »

 
James Fullsome

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Rate Member   posted 01-28-2006 09:18 PM                       
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Galaxy and star formation

The Stelliferous Age - from 106 to 1014 years

The Matter Domination Epoch: 379,000 years
Hydrogen nuclei (protons) capture electrons, forming the first atoms. By now the Universe has created all the matter it will create and the resulting primordial hydrogen and helium are already clumping into primordial galaxies and quasars. Big Bang Era ends as we move into the Stelliferous Era, which continues to this very day.


The Galaxy/Star formation and reionization Epoch: Between 100,000,000 and 1,000,000,000 years
The formation of first mature galaxies and quasars begins to occur. Reionization of hydrogen nuclei occurs. This marks as the farthest back in time optical telescopes can see. Heavier elements begin to form as early massive stars supernova. The oldest stars in our Milky Way galaxy date from this era.

Formation of the Solar System: 9,100,000,000 years
The solar nebula from which the solar system evolved was probably initiated by a supernova. The Earth formed shortly thereafter.


Present Time: 13,700,000,000 years
The Stelliferous Era of the Universe continues to this day as galaxies and stars continue to form and die, although the most active period of the Universe has already occurred far in the past.

For more recent timescales, see Geologic time scale, Timeline of evolution.


End of the Stelliferous Age: 100,000,000,000,000 years

Star and galaxy formation eventually ceases, leaving just the oldest stars that eventually burn out. The synthesis of heavy elements stops because fusion eventually ceases, and matter now undergoes slow and inevitable destruction as proton decay starts to set in. All matter is now contained in distributed gas clouds or compact bodies (a class of objects in the Universe that isn't luminous, like planets, black holes, etc.).
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"The sleep of reason brings forth monsters." - Goya
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