- Absolute Astronomy
- Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
- Aerospaceguide
- Space projects and information, including aircraft, business, exploration, history, and more.
- Astronomcal Applications Department
- Almanacs, software, and web services - provide precise astronomical data for practical applications, serving the defense, scientific, commercial, and civilian communities.
- The Astronomy Cafe
- Astronomy related information and resources from Dr. Sten Odenwald.
- Astronomy Clubs
- Online directory of different astronomy clubs, planetariums, and observatories worldwide.
- Astronomy Net
- Resources, searchable forums and searchable lists of organizations providing astronomy services.
- Astronomy Today
- Articles and features on astronomy, cosmology, space science and exploration, telescopes and a monthly sky guide detailing the planets, moon and stars.
- Curious About Astronomy?
- Sites posts visitor submitted questions and answers from a Cornell Astronomer.
- Encyclopedia Astronautica
- Resource providing articles on a vast variety of space technology subjects and space flight history.
- Eros Project: Property Rights in Space
- Article by Gregory Nemitz regarding his claim on Asteroid 433, Eros.
- European Space Industry Directory
- Offers extensive information regarding the products and companies related to space in Europe.
- Hands-On Universe
- Educational program that enables students to investigate the universe while applying tools and concepts from science, math, and technology.
- Heavens Above
- Real-time satellite, ISS, and Space Shuttle orbital pass information, maps, and star charts.
- Infrared Astrology
- History and applications of infrared astrology, atmospheric windows, news, and kids resources.
- NASA Astrophysics Data System
- Digital library maintaining collections of physics, astrophysics, and instrumentation information.
- Russian Space Web
- Information provided on rockets, spacecraft, people, and a chronology of Russians in space.
- Sea and Sky
- Offering information about the sea and the universe. With news, updates and other related facts.
- Space Future
- News and information dedicated to space tourism, habitats and vehicles.
- Space Studies Board
- Posts updates on the council's activities as well as overview of its staff and board members.
- Space.com
- Astronomy and space exploration focused news, multimedia clips, images, and articles.
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