1. Introduction to Cosmology

Some of the most important concepts in cosmology are well explained in Nick Strobel's notes, and I suggest you start by reviewing his pages on

Be warned that Strobel's section on the Fate of the Universe is seriously out of date. Many of the statements there are wrong because they incorrectly take for granted that the cosmological constant is zero.

We now need to look at these ideas in a bit more mathematical detail.