General Interest

• Astronomy Picture of the Day
• IAU Comm 14 at Catholic University

Resources

• American Astronomical Society 
• International Astronomical Union 
• The Astrophysical Journal
• WebStars: Astrophysics in Cyberspace

Atomic Data

• Atomic and Molecular Database for Astronomy

HST

• Space Telescope Science Institute

NASA

• NASA Home Page
• OSS Home Page
• Goddard Space Flight Center Home Page

For Young Astronomers

• StarChild: A learning center for young astronomers

Tools

• ADS Abstracts Service
• NASA Extragalactic Database

CMBR

• Wilkinson Microwave Anisotrophy Probe Home Page
• Ned Wright's Cosmology Tutorial
• Observational Cosmology at the University of Wisconsin, Madison

Useful Software for Scientists

• Netlib
• Octave -- a high-level language for numerical computations
• PVM: Parallel Virtual Machine