Quote:
Originally Posted by Stonius
This is what I'm getting at - I thought orbits were a function of mass and velocity?
How can Jupiter change orbits without changing its mass or velocity?
How can the additional mass of an extra moon *not change the earth's orbit?
Given such a large impact, I'm amazed our orbit isn't more eccentric.
But maybe, as you say, we have Jupiter to thank for that. But even so, presumably the earth would have been in a different orbit pre-Theia?
Markus
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Orbits changed because the sun output changed a few times at the very beginning if I recall it was colder then got hotter.