The High Energy Astrophysics Science Archive Research Center (HEASARC) is the primary archive for high-energy astronomy missions, in the extreme ultraviolet, X-ray and gamma-ray wavelengths. This is the portal for the Chandra X-Ray Observatory archive.
NASA's data center for Cosmic Microwave Background (CMB) research provides CMB researchers with archive data from NASA missions, software tools, and links to other sites of interest.
The Multimission Archive at STScI is a NASA funded project to support and provide to the astronomical community a variety of astronomical data archives, with the primary focus on scientifically related data sets in the optical, ultraviolet, and near-infrared parts of the spectrum.
NExScI is the science operations and analysis center for NASA's Exoplanet Exploration Program. It provide tools and archives for the exoplanet community.
NED is a master list of extragalactic objects for which cross-identifications of names have been established, accurate positions and redshifts, and some basic data collected.
NASA's archive of Infrared and Submillimeter data; host site for NASA Extragalactic Database (NED), and the legacy site of the Spitzer Space Observatory.
Resource for basic data, cross-identifications, observational measurements, and bibliography, for celestial objects outside the solar system: stars, galaxies, and nonstellar objects within our galaxy, or in external galaxies.
The Astrophysics Data System (ADS) is a NASA-funded project which maintains three bibliographic databases containing more than 5.6 million records. It is an online archive of astronomical, astrophysical and physics literature.