We did not discover nuclear fusion from the stars, we realized the possibility of nuclear fusion and subsequently realized that this is what must power the sun (and every other star).
Ditto for everything else on that list. We made discoveries by looking at things and performing experiments here on earth and then realized that these things must be what is causing X and Y out in the cosmos.
Ditto for everything else on that list. We made discoveries by looking at things and performing experiments here on earth and then realized that these things must be what is causing X and Y out in the cosmos.