Physics highlights a selection of papers from the Physical Review journals.
An archive and source of scientific data from NASA planetary missions, astronomical observations, and laboratory measurements.
A series of online databases hosted by NIST containing physical constants, spectroscopy data, X-ray and gamma-ray data and more
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.
Sloan and Palomar Sky Surveys
National Astronomy and Ionosphere Center, Cornell University
Chandra X-Ray Center, Smithsonian Astrophysical Observatory and the National Aeronautics and Space Adminstration
Johns Hopkins University (and others) and the National Aeronautics and Space Adminstration. Archive is at http://archive.stsci.edu/fuse/
California Institute of Technology and the National Aeronautics and Space Adminstration
National Maritime Museum
Space Telescope Science Institute and the National Aeronautics and Space Adminstration
California Association for Research in Astronomy
Mount Wilson Institute
National Astronomical Observatories, Chinese Academy of Sciences (China)
French Ministry of Higher Education and Research
California Institute of Technology
Pulkovo (Central Astronomical Observatory of the Russian Academy of Sciences) (Russia)
Jet Propulsion Laboratory, California Institute of Technology and the National Aeronautics and Space Administration
Database of particle physics papers maintained at Stanford Linear Accelerator Center (SLAC). Successor to SPIRES.
Particle physics articles, preprints, books and proceedings papers
Preprint archive, 1991 to present