The American Asscociation of Variable Star Observers website. Everything you could possibly want know about variable stars, includes a lightcurve generator.

The BAA Variable Star Section. More variables, contains some interesting articles.

A different astronomical image everyday with an explanation and plenty of relevent links to other sites.

Enter the co-ordinates of the region you wish to look at and you will recieve an image (typically 10arcmin across) from the Palomar all sky survey. Slow but invaluable for checking out those suspect novae.

The Asscociation of Lunar and Planetary Observers. Tons of interesting stuff about the moon and planets, lots of good links to other sites too.

Want to see a star occulted by an asteroid? Check this site for the latest news and ephemeris and then send in your observations. Refers to UK Only.

A complete list of the Messier objects sorted by type has lots of information plus many amateur images.

A site similar to my own, but geared towards smaller telescopes. Well worth a look.

A great amateur astronomy resource. Check it out.

Weekly news about the night sky and articles on selected astronomical topics.

Possibly everything you could want know about these fascinating objects.