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Amateur
Amateur Contributions to Science, Amateur Telescope Making, Astrophotography and CCD Imaging, Beginners, Binocular Astronomy, Chats and Forums, Classifieds, Constellations, Deep Sky Observing, Observatories
Associations
American Association Of Variable Star Observers (, American Astronomical Society (AAS), Antique Telescope Society, Association of Lunar & Planetary Observers, Astronomical Society of the Pacific, Euro-Asian Astronomical Society, European Association for Astronomy Education, European Astronomical Society (EAS), Global Network of Astronomical Telescopes (GNAT), International Association of Geodesy
Business
Books and Magazines, Domes and Observatories, Educational Resources, Expeditions, Meteorites, Stargazing Events, Telescopes, Binoculars and Accessories, Astronomy Mall
Calendars and Timekeeping
Sundials, Annus Novus Decimal Calendar, Astro Portal - CalSKY, Astronomical Time Keeping, Astronomy by JavaScript: Sun Calculators and More, Blue Moon Myths, Britannica.com - Clockworks: From Sundials to the , Calendar Studies, Calendars through the Ages, Calendopaedia, Calendrical Calculations
Cosmology
A Brief History of Time, Astronomy Today - Cosmology, Cambridge Cosmology Homepage, COBE, Conversational Cosmology, Cosmology, Cosmology, Cosmology, Cosmology, Cosmology Books and Links
Data Archives
Solar System, Stellar and Astrometric, Supernovae and Remnants, 2dF QSo Redshift Survey (2QZ), AAVSO International Database, ADC - Astronomical Data Center, Astronomical Data Center, Astronomy Picture of the Day Archive, Astronomy: Data Archives, AstronomyNook, Byte-O-Matic.NET Astronomical Information Archive, CADC - Canadian Astronomy Data Centre, Cambridge Astronomical Survey Unit
Directories
Amateur Astronomy, AstroLinks - Internet's Astronomy Guide, Astronomy by ExploreSpace.com, Astronomy Links for Drennon's Science, Astronomy Resources, Astronomy Resources on the NET, Astronomy World Wide Space Link, Astronomylinks.com, Blue Planet Landing Site, Cosmobrain Astronomy and Astrophysics
Eclipses, Occultations and Transits
Eclipses, Occultations, Transits, Planetary Phenomena
Education
Association for Astronomy Education (AAE), Astronomy 101, Astronomy at Grainger Observatory at Phillips Exe, Astronomy Basics, Astronomy Dept., The University of Arizona, Astronomy Education in the United States, Astronomy In Your Hands, Astronomy Page for Science Explained, Astrophysics Visualization Archive, Australia Telescope Outreach and Education
Extrasolar Planets
A Planet from the Early Universe, About Astronomy & Space - Two Architectures Ch, Anglo-Australian Planet Search, Arizona Search for Planets (ASP), California and Carnegie Planet Search, Darwin - Space Infrared Interferometer Project, Darwin Space Inferometer Project (ESA SCIENCE), Eddington (ESA SCIENCE), European Extra-Solar Planet Consortium, ExNPS Road Map - August 1996
Extraterrestrial Life
Exobiology, Fermi's Paradox, Panspermia, SETI, Life Extraterrestrial: Life on Other Planets in th, Search for ET!, The Planetary Society, The Rise and Fall of Star Faring Civilizations in
Galaxies
Active Galactic Nuclei - Quasars, Milky Way, Black Holes, Collection of Galaxy Pair/Interacting Galaxies Ima, Dust in Spiral Galaxies, European Network: The Formation and Evolution of G, Extragalactic bookmarks, Galaxies, Galaxies, Galaxy Collisions, Galaxy Pair Picture Gallery, High Redshift Supernova Search
History
Eclipses, Occultations and Transits, Instruments, Observatories, People, Solar System, Worldviews, A Brief SETI Chronology, A Science Odyssey - Physics and Astronomy, Astronomical References in the Ruba'iyât of O, Astronomy, Astronomy in Japan, Astronomy in Sweden 1860-1940, Astronomy in the 18th Century, Atlas Celeste, Biennial History of Astronomy Conferences, Big Ear Radio Observatory
Images
Comets, 321 Space, AAO Color photographs, Aladin previewer, Astro Gallery, Astro Photo Gallery, Astrojan Astronomical Picture Collection, Astronomical Image Galleries, Astronomical Image Library, Astronomical Images, Astronomical Pictures of Galaxies
In the Arts
Alessandro Gattuso, Art, Food and Astronomy, Solar Voyager, The Golden Age of the Celestial Atlas
Institutions
Academic Departments, Observatories, Planetariums, Research Centers, Howell Observatory, Interferometry Center of Excellence
Interstellar Medium
Emission Nebulae, Planetary Nebulae, Reflection Nebulae, Colorado Model of the Local Interstellar Cloud, Interstellar Medium Learning pages, Interstellar Molecules evolutionary cycle, Nebulae, Observations of Interstellar Molecules, The UCL Centre for Cosmic Chemistry and Physics, The Web Nebulae
News and Media
All Headline News: Astronomy, ASTRA - The News of Space Science, Astronet, ASTRONOMY Magazine -- News, CNN - Science & Technology: Space, Discovery Online -- Space Guide, European Space Agency's news, ExoScience News, IAU Astronomical Headlines, Jonathan's Space Report
Personal Pages
A Practical Guide to Astronomy, Abhijit's Planet, Alohacyberian of Hawaii, Amateur Astronomy Resources, An Astronomy Linkpage, An Observation of the Night Sky, Arpad Cserkuti, Astro Workgroup Mercator, Astrocentral, Astronomy - What's Up This Month
Publications
Books, Journals, Magazines, Newsletters, The Astronomer's Telegrams
Software
Computational Astrophysics, Desktop Planetarium and Charting, Education and Multimedia, Image Processing and Data Analysis, Space Simulation, Toolkits and Observing Utilities, Approximate Astronomical Positions, AstroMB, Astronomy Common Object Model (ASCOM), Astronomy Formulas, Astronomy Software Resources, Astronomy-related software, AstroTips - Astronomy Freeware and Shareware, Cartes du Ciel / Sky Charts, Computing planetary positions, Computing planetary positions
Solar System
Asteroids, Comets and Meteors, Conferences, Earth, Jupiter, Kuiper Belt, Mars, Mercury, Neptune, Oort Cloud, Pluto
Star Clusters
Globular Clusters, Open Clusters, Lacaille and his catalog of clusters and nebulae, Star Clusters, Stellar Clusters
Stars
Binary Stars, Dwarf Stars, Names, Neutron Stars, Novae and Supernovae, Stellar Evolution, Variable Stars, Astrometry Department, U.S Naval Observatory, Astronomy 162: Stars, Galaxies, and Cosmology, BBC Space - Stars, Bright Star Catalogue, Buy a Star, But It's Not Yours, Cosmobrain, Dark Stars, Black Holes, Bright Galaxies, ESO Photo Gallery - Astronomical Images, Hawaiian Astronomical Society - Deepsky Atlas, How Stuff Works: Stars
Absolute Astronomy
Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
An Atlas of the Universe
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.
An Introduction to Astronomy
Learn about astronomy; goes into lots of details, and also has lots of astro-clip art.
Astronomical Applications Department, U.S. Naval O
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.
Astronomical Optical Interferometry
The use of multiple telescopes to produce high resolution images - commonly used at most modern observatories. A literature review article.
Astronomical Pseudo-Science: A Skeptic's Reso
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.
Astronomy Campfire Chat
Forum and chat for discussing astronomy.
Astronomy Education and Outreach
General astronomy tutorial, education links, web courses, documents at the UCSD Center for Astrophysics and Space Sciences.
Astronomy Facts and Trivia
Fun facts and trivia relating to astronomy, space, science fiction movies. Most trivia items are submitted by users.
Astronomy for All
Index with graphics and illustrations about stars, the Solar System, cosmology and Galileo.
Astronomy Net
Resources, searchable forums and searchable lists of organizations providing astronomy services.
Astronomy Today
Information and articles on astronomy, space and related topics. Also features a friendly forum and a telescope buyer's FAQ page.
AstroWeb
Astronomical Internet resources by the Space Telescope Science Institute.
Australia Astro Site
Extensive resources for astronomy.
Beyond Earth - Everything Not on Earth
Provides information about the beginning of universe and solar system. About the planets, quasars, the Milky Way, black holes. Life of a star. Travel in space and extra terrestrial beings.
Eric Weisstein's World of Astronomy
A web encyclopedia. Over 500 entries, ranging from definitions to full articles.
Infrared Astronomy
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.
Logarithmic Maps of the 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.
Space.com - The Greatest Myths, Hoaxes & Myste
Article briefly discussing 21 topics.
The Naming of Stars
Leaflet from Royal Greenwich Observatory.