Mount Palomar Observatory – Houses the 200 inch Hale telescope, the 48-inch (1.2-meter) Samuel Oschin Telescope , and the 60-inch (1.5-meter) telescope .
SkyatNite.com-Experimenting with Astophotography in a whole new Light with more affordable methods, and more!
Stellafane – The world famous amateur telescope makers club and yearly convention.
Howardites Meteorites – Fun site if you are interested in Meteorites. It is an auction site with no fees. They specialize in meteorites but also have other astronomical items for auction including telescopes. If you want to sell (or buy) astronomy related items you should check out this site.