AAS

American Astronomical Society membership directory

Astronomy Picture of the Day - NASA

Educational platform featuring daily high-resolution images of cosmic phenomena with descriptions.

CosmoCoffee - Astronomy Forum

Online discussion forum for professional scientists working in cosmology and gravitation.

ESO

Directory of Astronomy Librarians and Libraries

IAU - Links to Astronomical Organizations - Links to Astronomical Organizations

A comprehensive directory of astronomical organizations, observatories, and resources maintained by

NASA Center Libraries

NASA Center Libraries

Ph.D. Alumni - Caltech Astronomy

List of Ph.D. alumni from the California Institute of Technology"s astronomy graduate program.

SIMBAD Astronomical Database

Reference database for the identification of astronomical objects. Query by name, coordinates, or reference codes.

Star Pages

Astronomy Yellow Pages on the WWW

Star*s Family of Astronomy and Related Resources

Star*s Family of Astronomy and Related Resources

The IAU Thesaurus

The official multilingual thesaurus for astronomy, maintained by the International Astronomical Union

Universe glossary - NASA Science

A glossary for terms relevant to the study of the Universe.

Your Sky

Your Sky is an interactive planetarium on the Web. You can produce maps of the sky for any time and from any location on the Earth.