Where did gravity come from?

505 views

I think this is physics

In: Physics

2 Answers

Anonymous 0 Comments

Isn’t a magnetic thing with the earth’s core?

Anonymous 0 Comments

This is almost a philosophy question. Physics doesn’t really concern itself with the “whys” of the laws that govern things, it just describes prior phenomena, and makes predictions about future phenomena.

There are a couple ways of answering it, though, all are unsatisfactory, as we don’t have a complete grasp of gravity as it relates to the beginning of the universe.

The first way we can think of gravity is as the bending of the 4 dimensional space-time. This has the advantage that gravity “comes from” the inherent geometry of the universe, and is just an emergent phenomenon because of that.

The second way is that we can describe gravity as one of 4 fundamental forces that arose at the Big Bang. The sticking point is that the other 3 all sort of “combine” at super high energizes, and the fact that gravity doesn’t is an open question in the study of theoretical physics right now, so we don’t have an answer in this framework. I mention this framework because it’s the more “fundamental” framework, and answering “why is gravity the way it is” will win a Nobel Prize, and likely change the course of particle physics forever.