Alternative 60
Archaeoastronomy 81
Astrophysics 61
Calendars and Timekeeping 51
Cosmology 101
Dark Sky 85
Eclipses, Occultations and Transits 71
Extrasolar Planets 37
Extraterrestrial Life 114
Galaxies 46
Interstellar Medium 13
Solar System 644
Star Clusters 14
Stars 114
Academic Departments 9
Amateur 1,206
Astronomers 22
Business 403
Data Archives 68
Directories 12
Education 46
History 171
Humor 5
Images 51
In the Arts 4
News and Media 32
Organizations 22
Personal Pages 73
Popular Topics 0
Publications 45
Regional 0
Research Groups and Centers 40
Shopping 38
Software 162
Women 20
Observatories 247
Planetariums 103
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Astronomy and Space - Science, School Time, Kids and Teens 317
Astronomy, Alternative - Anomalies and Alternative Science, Science 60
Physics - Science 4,564
Space - Technology, Science 1,552
 Absolute AstronomyAbsolute Astronomy
 Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
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 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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 The use of multiple telescopes to produce high resolution images - commonly used at most modern observatories. A literature review article.
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 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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 Introductory article provided by Citizendium, a developing encyclopedia project.
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 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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 General astronomy tutorial, education links, web courses, documents at the UCSD Center for Astrophysics and Space Sciences.
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 Fun facts and trivia relating to astronomy, space, science fiction movies. Most trivia items are submitted by users.
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 Index with graphics and illustrations about stars, the Solar System, cosmology and Galileo.
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 Resources, searchable forums and searchable lists of organizations providing astronomy services.
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 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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 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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 Astronomical internet resources from the National Radio Astronomy Observatory.
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 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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 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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 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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 A web encyclopedia. Over 500 entries, ranging from definitions to full articles.
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 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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 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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 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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 Leaflet from Royal Greenwich Observatory.
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 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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 Article briefly discussing 21 topics.
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 Information about interesting stars and planets in the galaxy, as well as astral bodies outside the Milky Way. Includes photos.
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 New Universe web directory with articles on a wide range of astronomical and cosmological topics.
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