Imagine two point-like particles experiencing mutual attraction.
The masses of the two particles are and , and their respective positions are and .
Suppose the force on particle 1 due to particle 2 is… 747 more words
Gauss’s flux theorem for gravity (also known as Gauss’s law for gravity) in differential form says that
In this note I want to show that one can get quite far towards deriving Gauss’s law for gravity without knowing Newton’s law of universal gravitation, but not all the way. 170 more words
There are a lot of reasons not to get an astrophysics PhD, as many people with astrophysics PhDs will tell you. The job market is 928 more words