Data sets in the Astronomical Data Center's Astrometric, and Positional data holdings. Contains site map, science data, news, and feedback.

A catalog of spectroscopically identified white dwarf stars, by George P. McCook and Edward M. Sion

A spectroscopic survey of 3600 nearby stars within 40pcs earlier than M0. Contains real-time spectral plots, and coordinate lists. Also MK standards.

Table with details about the 50 nearest stars. Names, distances, constellations, spectral types, magnitudes and coordinates.

The Double Star Library hopes to be a means by which various types of binary and multiple star information can be easily disseminated among binary star astronomers in IAU Commission 26 and related commissions.

home page, site guide, research tools, news and results, the catalogues, education, visual results, further information, the future, animations.

USNO is making the USNO-SA2.0 catalog (54,787,624 stars in all on one CD-ROM) available for free. The full USNO-A2.0 catalog (526,230,881 stars on 10 CD-ROMs) is also available provided you can provide a brief explanation of why USNO-SA2.0 is not sufficient. That's information on over half a billion stars!

An electronic database of the white dwarf stars.