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Tsync Tsync
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8 years ago
What key event took place during the atomic epoch?
A) The universe expanded and cooled enough for electrons to orbit protons.
B) The neutrinos were created.
C) The universe expanded and cooled enough to allow the first particles to appear.
D) The universe underwent a brief period of rapid expansion.
E) Atoms in the universe collected to form stars and galaxies.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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8 years ago
You answered my question so timely, I really value that, thank you
Minoring in physics
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8 years ago
Slight Smile
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