Basic material for Cosmology

The following is a summary of the most essential material in the Cosmology lecture series. Some chapters have not yet been translated into English, and in some places the material is fairly simplified to show the basic ingredients most clearly. For more details consult the literature, such as the books by Achterberg, Coles & Lucchin, Narlikar, Padmanabhan, Peacock, Peebles or Weinberg. I have tried to be precise, but these pages may contain typos. Please report any errors to icke@strw.leidenuniv.nl. Duplications in this manuscript have not yet been corrected everywhere.