Related to my previous post, if you’d like to se an animation of the central S-stars, check out this video.
Massive Evidence
In the center of our galaxy is a supermassive black hole. We can see stars orbiting it, so we know just how massive it is.
Gravitational Lensing
Einstein said space was curved, but how to we know it really is? It turns out we can observe that curvature by watching light bend around a large mass such as a galaxy.
Black Holes
Black holes are objects that are so dense that not even light can escape them. But that’s only if you get too close.
Equivalent Principles
The equivalence principle states that everything falls at the same rate in a gravitational field. But what about antimatter? We think it would fall just like regular matter, but we haven’t yet been able to put that assumption to the test.
Dark Matters
The first evidence of dark matter came from observing the motion of stars in our own galaxy. It turns out stars were moving far more quickly than they should. Ever since then astronomers have tried to determine just what dark matter is.
It Goes to Eleven
String theory proposes that there may be 11 dimensions to the universe, where we only see space and time. We couldn’t see these extra dimensions directly, but if they are there we could observe their effect on gravity.