>> At the time that our sun was born, the ratio of deuterium to hydrogen throughout the universe was about 1 deuterium molecule to every 100,000 hydrogen molecules.
And you know this how, Deborah?
Well, I’m guessing that she is not relying on something somebody wrote down in a book a few thousand years ago.
This is a hypothesis - maybe even a tentative conclusion - based on the determination of facts via measurement and experimentation, and a certain amount of speculation based on experience and other facts known to the researcher, also based on measurements and experimentation.
Does tis sort of thing make you nervous?
“And you know this how, Deborah?”
It’s fairly simple. We use time machines to look at the compositon of those nebulae of hydrogen and deuterium as they actually existed 4-6 billion years ago and earlier.
“At the time that our sun was born”
Sounds like the beginning of a fairy tale.
The earth is older than the sun? LOLOL!!!!