• NASA Information Services
• European Space Agency
• European Southern Observatory On-Line
• American Astronomical Society Home Page
• AstroWeb: Astronomical Internet Resources
• Comet Observation Home Page
• Whispers From The Cosmos ("Science for the Millennium" Online Expo)
• Solar System Dynamics
• Astronomy On-Line
• New Opportunities in Computational Astrophysics
• Eclipse Home Page
• The Total Solar Eclipse of 1999 August 11 (NASA Reference Publication)

• Nuclear Astrophysics Data and References
• Nuclear Astrophysics
• Bradford Robotic Telescope: Automated Telescope on the Web
• Space Telescope Science Institute Home Page
• Comet Hale-Bopp Home Page
• Comet Hale-Bopp Home Page (NASA)
• The Extrasolar Planets Encyclopaedia
• Mars Pathfinder
• Earth and Moon Viewer
• Star Map
• Live from the Hubble Space Telescope
• The Earth View ECLIPSE Network
• Eclipses in Europe
• GSOC Satellite Predictions
• LOFAR

• Your Sky
• Online University: Astronomy: A look at the Night Sky
• Hands-On Universe
• Big-Bang Cosmology
• Dark Matter
• The Hubble Constant
• NASA's Cosmicopia
• Imagine The Universe! by NASA

• Handbook of Space Astronomy and Astrophysics
• Stars and Constellations
• History of Astronomy: Persons
• Nuclear Astrophysics
• Astrophysical Constants
• Helium Burning in Stars
• Big-Bang Nucleosynthesis

Multimedia, Pictures etc.

• NASA Photo Gallery
• Astronomy Picture of the Day
• The Messier Catalog
• An Archive of NGC Images from Grove Creek Observatory
• The Galaxy Catalog
• Stars and Galaxies: Multimedia Guide
• The Nine Planets: A Multimedia Tour
• Cosmos in a Computer (from the "Science for the Millennium" Online Expo)

Journals,Preprints etc.

• Annual Review of Astronomy and Astrophysics
• The NASA Astrophysics Data System Home Page
• E-print Archive Astrophysics
• The Astrophysical Journal
• The Astronomer Magazine
• Sky Publishing Corporation Home Page
• Astronomy Magazine

Software

• Xephem: An Astronomy Program for X Windows/Motif
• Home Planet for MS Win95 and NT4.0

Astronomical sites and resources in Croatia

• Zvjezdarnica Visnjan - Visnjan Observatory