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Handbooks and Data
Conversion of Units
An online conversion calculator from the Institute of Chemistry at the Freie Universität Berlin.
PDS: Planetary System Data
An archive and source of scientific data from NASA planetary missions, astronomical observations, and laboratory measurements.
Physical Reference Data
A series of online databases hosted by NIST containing physical constants, spectroscopy data, X-ray and gamma-ray data and more
NASA's High Energy Astrophysics Science Archive Research Center
The primary archive for NASA missions dealing with extremely energetic phenomena, from black holes to the Big Bang.
Digital Lunar Orbiter Photographic Atlas of the Moon
The definitive reference manual to the global photographic coverage of the Moon, a reproduction of the 675 plates contained in NASA SP-206, written by Bowker and Hughes.
Landolt Bornstein Group VI Astronomy and Astrophysics
Preview volumes of print in Science Reference: QC61.L2582
Includes position and time determination, astronomical constants, abundances of the elements in the universe, the solar system, special types of stars, star clusters and associations and more.
Digital Sky Survey
Sloan and Palomar Sky Surveys
Other online sources
Annual Review of Earth and Planetary Sciences - Comprehensive yearly volumes of critical reviews written by leading scientists in the earth and planetary sciences fields.
HyperPhysics - A free online resource covering many topics in astrophysics (and other branches of physics), maintained at Georgia State University.
Weisstein's World of Astronomy - A free online resource covering many topics in astronomy, maintained by Wolfram Research.
Selected Print Sources in the Science Library Reference Collection