This is a Java script calculator to find an age or a lookback time given your choice of cosmology. At the end of this course you should be able to do this yourself, but in the mean time it provides a very quick way to answer the question "How old was the Universe when that z=8 galaxy emitted the light you saw yesterday?"

A nice tutroial including "News of the Universe" which lists new results Ned thinks are worth reading about.

The page also debunks bad ideas nicely, but only ideas which are not so bad that anyone could debunk them.

One stop shopping for CMB data. likelihood chains and mission descriptions.

The page includes links to CAMB the Code for Anisotropies in the Microwave Background, which calculates a CMB spectrum corresponding to your choice of parameter values.