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Published online by Cambridge University Press: 25 April 2016
On today’s Internet, resources for astronomical research abound, and are available from wherever a connection is available. These are mostly in the form of freely accessible databases, ranging from literature services to space-mission archives. They offer instant access to the latest published data and papers, and unique opportunities for archival and innovative research. A sampling of such services will be listed, with notes on accessibility from far-flung points on the planet.