• Sky & Telescope: Sights
• Jack Horkheimer: Star Gazer
• Earth & Sky: Tonight's Sky
• Weather Underground: Astronomy (star charts)
• Space.com: Your Sky Tonight
• US Naval Observatory: Sun & Moon
• JPL Space Calendar
• Astronomy Magazine: The Sky Show
• StarDate Online

Phenomena

• Espenak's Eclipse Home Page
• American Meteor Society: Meteor Showers
• Gary W. Kronk: Comets & Meteor Showers

Reference

• Mark Wade's Encyclopedia Astronautica
• The Project Apollo Archive
• The Apollo Saturn Reference Page
• Space Shuttle News Reference Manual

• NASA Homepage
• Students for the Exploration and Development of Space (SEDS)
• Starport.com
• space.com
• European Space Agency

Space link collections

• Hiterdra Patel's Space Links
• LiveSky
• Google Web Directory: Astronomy
• Ben's Space Page

Software

• Syzygy Research & Technology: The Digital Universe
• Sienna Software: Starry Night
• Software Bisque
• SEDS list

• SpaceDaily.com
• SpaceScience.com
• Astronomy Now: Breaking News
• SpaceViews
• Today@nasa.gov
• NASA-TV on the Web
• NASA-TV Event Schedule
• Yahoo! Space Coverage
• CNN - Technology:Space
• Florida Today: Space Today
• Sky & Telescope: News
• NASA Science News

Missions & projects

• NASA: Project Home Pages
• Popular Science: 5 Year Guide to Space Exploration
• NASA Space Shuttle
• International Space Station
• Hubble Space Telescope
• Chandra X-Ray Observatory Center (novas, nebulas, etc)
• Voyager 1 & 2 (outer planets)
• Galileo (Jupiter & moons)
• NEAR (asteroids)
• Cassini (Jupiter Millennium Flyby)
• Ulysses (Sun's poles)
• SOHO (Sun)
• TRACE (Solar atmosphere)
• SFSU Extrasolar Planets Search
• SETI Institute (ETs)