Timeline for How does the ratio of hydrogen to helium help prove the big bang theory?
Current License: CC BY-SA 4.0
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| Jun 5, 2019 at 7:00 | comment | added | Martin Kochanski | It is good that you have pointed out that nucleosynthesis only started when the universe was relatively cold & is thus relatively insensitive to what might have gone on at higher energies. The abundance of deuterium is another good instance. The time between it being cold enough for deuterium to survive and too cold to make any deuterium is relatively short, which is why we don’t have much of it. | |
| Jun 4, 2019 at 0:58 | history | edited | G. Smith | CC BY-SA 4.0 |
added 293 characters in body
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| Jun 4, 2019 at 0:52 | history | answered | G. Smith | CC BY-SA 4.0 |