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Questions regarding the Sun and objects orbiting it.
9
votes
What was the length of year 1 million years back?
(Disclaimer: As I already pointed out in a comment to the question above, I never did a calculation with $H_0$ before and I might be utterly, horrible wrong with my interpretation.)
If you completely …
2
votes
Do solar systems have to evolve in a galaxy?
Stars form in star-formation regions, which itself develop from molecular clouds. The paper "The Minimum Mass of Molecular Cloud Cores" [1] claims that there is a minimum mass and density for a molecu …