Quote:
Originally Posted by tommac
I mean I would like to skip all of the quantum stuff ... or any part of the classes that are not relevant to gravity.
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This only works in popular imagination. You can't just pick some part of physics, like gravity, and study it all by itself, as if the rest of physics does not even exist. That would be a complete waste of effort, and contrary to your intuition on the matter, you would not learn about gravity as much as you think. Gravity exists in the context of physics. So you know gravity, but never study thermodynamics. So you don't know that a collapsing gas cloud forming stars has to simultaneously obey the laws of gravity and the laws of thermodynamics, and you wind up not knowing what you are doing despite your knowledge of gravity. Remember the title of Tolman's book
Relativity, Thermodynamics and Gravity. Tolman realized that the universe has to obey the laws of
physics, all of them at once. He laid the theoretical basis for the later prediction of the later observed CMB. You simply cannot pick & choose which part of physics you want to study. It doesn't work.