- #1
iced199
- 29
- 1
With our stars consuming hydrogen to make helium, how much has been consumed since the Big Bang? I know 73 or so percent of the total mass of the visible universe is hydrogen, so how much has been consumed? IE, what was the original proportion of hydrogen to helium to other elements? I know we are not in any danger of stars using up all our hydrogen in the near future, but still, just curious. Thanks.