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Eric Weisstein's World of Astronomy - http://scienceworld.wolfram.com/astronomy/
A web encyclopedia. Over 500 entries, ranging from definitions to full articles.
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Astronomical Applications Department, U.S. Naval Observatory - http://aa.usno.navy.mil/
Computes the position, brightness, and other observable characteristics of celestial bodies, as well as the circumstances of astronomical phenomena. Includes information on calendars and related topics.
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AstroWeb - http://www.cv.nrao.edu/fits/www/astronomy.html
Astronomical internet resources from the National Radio Astronomy Observatory.
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Absolute Astronomy - http://www.absoluteastronomy.com/
Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
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An Atlas of the Universe - http://www.atlasoftheuniverse.com/
Contains 3D maps of the universe zooming out from the nearest stars to the scale of the galaxy and out to the surrounding superclusters and finally to the scale of the known universe.
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Astronomy Education and Outreach - http://casswww.ucsd.edu/public/astroed.html
General astronomy tutorial, education links, web courses, documents at the UCSD Center for Astrophysics and Space Sciences.
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Astronomical Pseudo-Science: A Skeptic's Resource List - http://www.astrosociety.org/education/resources/pseudobib.html
List of links for those, who want to examine theories that are on the fringe of accepted scientific thought that are related connected to astronomy. A few examples are astrology, UFO's, the "Face" on Mars, and ancient astronaut theory.
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Astronomy Today - http://www.astronomytoday.com/
Information and articles on astronomy, space and related topics. Also features a friendly forum and a telescope buyer's FAQ page.
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Astronomy Net - http://www.astronomy.net/
Resources, searchable forums and searchable lists of organizations providing astronomy services.
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Logarithmic Maps of the Universe - http://www.astro.princeton.edu/~mjuric/universe/
Show universe in terms of distance from Earth center. Includes such things as satellites, planets, stars, nebulae, and galaxies, out to cosmic microwave background radiation from the Big Bang.
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Infrared Astronomy - http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ir_tutorial/
All about infrared astronomy from NASA's infrared astronomy center: Discovery of infrared, what is infrared and infrared astronomy, history, the infrared universe, gallery, activities, discoveries, missions and a lot of links to IR astronomy sites.
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Astronomy and Space - http://astronomyspace.suite101.com/
Explores the latest research in astronomy, with overviews of planets and deep-space issues, oberving tips for constellations and what can be seen in the sky tonight.
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Astronomy Online - http://astronomyonline.org
Gives overview of the solar system, the Milky Way galaxy, extrasolar planets, cosmology and astrophotography. Includes images, additional resources, and forums.
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Stars and Planets - http://jumk.de/astronomie/astronomy.shtml
Information about interesting stars and planets in the galaxy, as well as astral bodies outside the Milky Way. Includes photos.
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Muse - http://muse.univ-lyon1.fr/
Multi Unit Spectroscopic Explorer. A second generation integral field spectrograph for the VLT. Proposed to European Southern Observatory (ESO) by the Centre de Recherche Astronomique de Lyon (CRAL).
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Space.com - The Greatest Myths, Hoaxes & Mysteries in Astronomy and Space Science - http://www.space.com/scienceastronomy/myths_hoaxes_030325.html
Article briefly discussing 21 topics.
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A Review of the Universe: Structures, Evolutions, Observations, and Theories - http://universe-review.ca/
A retired physicist surveys the entire extent of the universe touching upon phenomenon from the largest to the smallest size and covering the entire cosmic interval from past to present.
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Cosmos Portal - http://www.cosmosportal.org
Offers information on astronomy and space science including news, events, blogs, images, videos and links to other sites. It is written and compiled by experts.
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The Naming of Stars - http://www.nmm.ac.uk/server/show/conWebDoc.309
Leaflet from Royal Greenwich Observatory.
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Astronomy Facts and Trivia - http://www.funtrivia.com/ql.cfm?cat=59
Fun facts and trivia relating to astronomy, space, science fiction movies. Most trivia items are submitted by users.
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Astronomy for All - http://www.pd.astro.it/E-MOSTRA/A0000HOM.HTM
Index with graphics and illustrations about stars, the Solar System, cosmology and Galileo.
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Astronomy - http://en.citizendium.org/wiki/Astronomy
Introductory article provided by Citizendium, a developing encyclopedia project.
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Astronomical Optical Interferometry - http://astronomicaloptical.blogspot.com/
The use of multiple telescopes to produce high resolution images - commonly used at most modern observatories. A literature review article.
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Elegant Universe - http://www.elegant-universe.webs.com
Provides introductory information about galaxies, the big bang, stars, the solar system, planets, asteroids, comets, astronomical events and astronomy related news.
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