Gamemastering Secrets

The Gamemaster's Web

Science

Astronomy: Astrophysics

Astronomy Notes

A full, introductory astronomy course online. A great reference if you want to look something up about basic astrophysics.

Star Mapping

Winchell Chung's 3d Starmaps

One of the best sites on the web with information about drawing three diemensional star charts, and with charts of the stars near our own Sun.

An Atlas of the Universe

A great page of star maps, starting with stars within 12.5 light years of the Sun and working out to the visible univers3.