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General facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
http://www.absoluteastronomy.com/
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02. Observable Universe and Beyond. 03. Superclusters. 04. ... 15. Elementary Particles and the World of Planck Scale. 16. Frontier of Science. 17. Appendices ...
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Daily updates, archives since June 1995. Descriptions and bookmarks by an astronomer.
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Illuminates the science, math, and technology lurking behind the headline news.
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Fact Monster is a free reference site for students, teachers, and parents. Get homework help and find facts on thousands of subjects, including sports, ...
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Research news from NASA.
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Offers free sky maps of the northern and southern hemispheres for stargazing purposes.
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Track seasonal cusp moments in universal time, according to the Earth's orbit. Includes lessons on the astronomical mechanics of equinoxes, soltices, and cross quarters.
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A different astronomy and space science related image is featured each day, along with a brief explanation.
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