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| Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects. |
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| Google PR |
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| General facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects. |
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| Google PR |
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| Interprets the exploration of the Universe for the broadest possible audience and hosts one of the finest collections of early astronomical instruments in the world. |
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| Google PR |
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| Learn about astronomy; goes into lots of details, and also has lots of astro-clip art. |
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| Google PR |
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| Guide to astronomy facts including facts on stars, planets, comets, quasars, and black holes. |
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| Google PR |
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| Provides photographs, diagrams, and the history of the astrolabe, an instrument used by early astronomers for solving problems relating to time and the position of the stars. |
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| Google PR |
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| Resources, searchable forums and searchable lists of organizations providing astronomy services. |
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| Google PR |
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| In-depth, concise website about astronomy from Crowell Observatory. |
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| Google PR |
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| Articles on astronomy, cosmology and space exploration, with a regularly updated sky guide and the latest space news. |
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| Google PR |
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| Provides nightly events, news, and information about space and space missions for amateur astronomers. |
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| Google PR |
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