Why do we assume that gravity and the speed of light are the same and constant throughout the universe? It is assumed that the mass of something can predicts its gravitational force (and vica-versa). What if gravity is proportional based on the location, temperature and/or speed of the mass? If dark matter has no mass, can it be matter at all?
I’ve always thought Newton was a fraud.
(kidding)
Doesn’t gravity have to be faster than light in order for it to work?