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.
Rotating Stars
Some stars rotate very quickly. So quickly that they bulge significantly at their equator. Is there a maximum rate of rotation? We can use a simple model to find out.
Star Light, Star Bright
The brightness of a star depends not only on how bright it actually is, but also on how far away it is. This is why we use quantities such as apparent magnitude and absolute magnitude.
Building a Better Star
We revisit the simple model of a star to see how to make a better stellar model.