I’m not a physicist, but I did read Astrophysics for People in a Hurry by Neil deGrasse Tyson. He attempts to explain such things as how, at the moment before the Big Bang, all of the matter and energy in the known universe was contained in a space a trillionth the size of the period that ends this sentence. Now that I think about it, trying to wrap my head around stuff like that is likely why I’m not a physicist. I can’t even comprehend a miniature Reese’s Peanut Butter Cup being packed into a wrapper that small, much less the sum total of all stuff that ever existed anywhere in the cosmos.
While the deGrasse Tysons and Hawkings of the world can ponder the great expanse in their studies, we mere mortals can make more practical use of the physical sciences for our shooting activities.