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Tsync Tsync
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8 years ago
What key event happened during the decoupling epoch?
A) Dark energy accelerated the cosmos on to infinity.
B) The universe underwent a brief period of very rapid expansion.
C) Electrons and positrons were created.
D) Expansion cooled the universe enough that protons could capture electrons in orbit.
E) Pairs of neutrons and protons were created.
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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#2
8 years ago
Exactly what I needed Smiling Face with Open Mouth
Minoring in physics
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#3
8 years ago
Message back if you need anything
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