| http://www.w3.org/ns/prov#value | - The database includes the 110 Messier objects, 90 interesting multiple and variable stars, 17 quasars and black hole candidates, 28 user-defined objects that you can program with the coordinates of objects, such as the comet and asteroid positions you???ll find monthly in Astronomy and Sky & Telescope magazines, and 28 alignment stars.
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