- Bad Astronomy
- Righting wrong ideas. Addresses astronomical and scientific misconceptions spread by movies, TV, the news, and popular beliefs. - NASA Astrophysics Data System
- Abstracts on astrophysics, astronomy, instrumentation, geophysics, and physics. Plus the Los Alamos preprint server, articles, and catalogues. - AbsoluteAstronomy.com
- General facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects. - SkyView
- Virtual observatory dynamically generating images of the sky in different wavelength regimes from a static image database, intended as a quick look facility to see the heavens. Night Sky Observer
- Contains news, articles, a sky diary, links, and more aimed at amateur astronomers and space buffs.- Sea and Sky
- Explore the splendors of the sea and the wonders of the universe through information, images, sounds, links, and interactive games. - Simbad
- Brings together basic data, cross-identifications, observational measurements, and bibliography, for celestial objects outside the solar system: stars, galaxies, and nonstellar objects within our galaxy, or in external galaxies. - Hands-On Universe
- Enables students to investigate the Universe while applying tools and concepts from science, math, and technology. - Space Place
- Make a pop rocket that really works, solve a riddle, and dive beneath the surface of Mars. Do these things and more, and learn about space and astronomy at the same time. - Astronomy HyperText Book
- Addresses cosmology, solar system geology, the properties of galaxies, planetary motion, interstellar medium, stellar evolution, and other related topics. - Encyclopedia of Astronomy and Astrophysics
- Articles covering cosmology, galaxies, interstellar medium, stars, the solar system, space missions, theoretical concepts, and more. Subscription required. - Nick Strobel's Astronomy Notes
- Complete astonomy textbook for first-year college courses. - PlanetDiary
- Presents weekly geological, astronomical, meteorological, biological, and environmental news from around the globe, plus Internet activities and links to science resources. - Munich Astronomical Archive
- Data on astronomical objects. Astronomy Ireland
- General interest Astronomy club and magazine with a distinctly Irish flavour.- FAQ - sci.astro
- Sci.astro is a newsgroup devoted to the science of astronomy. Its content ranges from the Earth to the farthest reaches of the Universe. - Canadian Astronomy Data Centre
- Distribution centre for observatory archives, catalogues, and more. - AstronomyDaily.com
- Offers real time astronomical data tailored to the viewer's location and time zone. - Astronomy for Kids
- Astronomy site specifically designed for kids and their parents. Includes sky maps, a beginners guide to star gazing, information about the planets, stars, eclipses, meteor showers, comets, and other celestial wonders. - Neave Lab: Planetarium
- Virtual clickable Flash planetarium. - Astronomy Sight
- In-depth, concise web site about astronomy from Crowell Observatory. - Zoom Astronomy
- Enchanted Learning page dedicated to space and astronomy, designed for people of all ages and levels of comprehension. - Astronomy and Astrophysics at NSSDC
 - Eric Weisstein's World of Astronomy
- Addresses the atmosphere, calendars, galactic and observational astronomy, remote sensing, the solar system, and the stars. - SkyQuery
- Prototype of a Federated database application, relying on several data sets: the Sloan Digital Sky Survey, the 2MASS project, and the First radio survey. - Aladin Java: A Sky Atlas
- An interactive atlas allowing the viewer to visualise digitized images, superimpose entries from astronomical catalogues, and access data from databases. - Astronomy Thesaurus
- Thesaurus of astronomy terms and synonyms in English, French, German, Spanish and Italian. From the Research School of Astronomy and Astrophysics. - Virtual Journey into the Universe, A
- Interactive guide to the cosmos. Cosmicdust
- Monthly celestial events. Includes a graphic calendar.- Better Living Through Astronomy
- General guide to astronomy . Includes articles and tips on telescopes. cosmology, astronomers, and more. - Astro Watch
- Guide to astronomy facts including facts on stars, planets, comets, quasars, and black holes. - Physics Astronomy Life
- Features information on relativity, quantum cosmology, search for extraterrestrial civilizations, and the origin of the universe. - Online Planetarium Show
- Educational site about the discoveries of the Hubble Space Telescope, historical astronomers, mythology, and light pollution. - Beyond Our Skies: Discovering the Cosmos
- Project presenting the history and basics of astronomy. - Stellar Neigborhood in VRML
- Thrilling 3D ride through interstellar space within 25 parsec of the sun. Database contains nearly 3000 stars. - Astronomy Interactive Network
- Detailed information about radio, optical, physics and the history of astronomy; with games, pictures, quizzes, glossary, timeline, links, and message boards. - Journey into the Heavens
- Astronomy guide presenting information about our solar system, constellations, the evolution of the universe, space missions, astronomers, and more. - World Book @ NASA
- Index of encyclopedia articles about the Earth's geology and atmosphere, the planets, celestial objects, astronomers, space missions, and other astronomy topics. - Multiwavelength Astronomy
- Explains astronomy's applications across the electromagnetic spectrum. - International Year of Astronomy (IYA2009) (13)
- Journey Through the Galaxy
- Explores our Solar System, the stars, extra-solar planets, the theories about the past and future of the universe, and human exploration of space.
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