Galactic dynamics

Was reviewing some basics in astronomy. Stuff such as the color-magnitude diagram for showing the relationship between the color and the brightness of stars (weird that astronomers call it color-magnitude coz it is really magnitude vs color diagram). Was also glad to see discussions of collisionless encounters (e.g. stuff that i work on) Great book for reviewing astrophysics overall, very clear and in depth. Will aim to read the potential theory part that has more to do with the dynamical DM simulations that I do.