NASA has a good explanation of the Electromagnetic Spectrum.
NASA also has an entire website on the Structure and Evolution of the Early Universe.
NASA has a website for its planned Origins Missions.
NASA's Origins Library also has information on the Birth and Formation of Galaxies as well as Star and Planet Formation.
IPAC also has an interesting section on The Early Universe.
IPAC has a detailed explanation of Infrared Astronomy.
GSFC has an excellent Astronomy Dictionary.
PBS explains the Big Bang as seen in Stephen Hawking's Universe.
UC Berkeley provides a detailed explanations of Dark Matter and the Big Bang.
Last Updated: 12/2/98