• Ireland's Astronomy On-Line Homepage
• StarChild - A learning center for young astronomers.
• Astronomy On-Line
• Astro Web
• Astronomy Hypertext Book
• N.A.S.A
• Observatories
• Strasbourg Astronomical Data Centre
• WebStars: Astrophysics in Cyberspace

Centre for Advanced Space Studies

• CASS

NASA

• NASA Astrophysics Data System
• NASA Headline News
• NASA WWW

Planetary Studies

• Centre for Earth and Planetry Studies
• Planetary Data System

Space News

• Space News