The Astronomical Data Center (ADC), at NASA Goddard Space Flight Center, Greenbelt, Maryland, is a cooperative effort between the National Space Science Data Center (NSSDC)/ World Data Center A for Rockets and Satellites (WDC-A-R&S) and its parent organization, the Space Science Data Operations Office . Currently, the ADC archives hold more than 670 catalogs of astrometry, photometry, spectroscopy, radio, and other miscellaneous data for stellar and nonstellar objects. The data were acquired through exchanges with the Centre de Donn'ees Astronomiques de Strasbourg (CDS) , other astronomical data centers throughout the world, and by direct contributions from the international astronomical community.
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