A couple of glaring omissions....

..to my list of useful websites below are:

The Planetary Society: All things space

The New Horizons mission to Pluto (Now officially a dwarf planet) and the Kuiper belt (A huge ring of ice asteroids and dwarf planets beyond the orbit of Pluto).

The Phobos - Grunt mission to the Martian moon Phobos, a very mysterious little world that could be a source for one of the strangest carbonaceous meteorites...