Description Link "The Discover the COSMOS coordination action aims to demonstrate innovative ways to involve teachers and students in e-Science through the use of existing e-infrastructures in order to spark young people’s interest in science and in following scientific careers." SIte contains links to educational software and resources.
Ewell Observatory Tools and information to assist astronomers
  Compute Values of Earth's Magnetic Field
  Distro Astro

Lunar and Planetary Institute Impact cratering  
  Society for Popular Astronomy
Amateur Spectroscopy Amateur website and resource
Sun and Moon Physics Forums
  Astronomy Online
  Astronomical Algorithms pdf