Astronomy and Space

• Amateur Astronomy
• Calendars and Timekeeping
• Cosmology
• Eclipses, Occultations and Transits
• Extrasolar Planets

• Galaxies
• Interstellar Medium
• Solar System
• Stars

• Colonization
• Extraterrestrial Life
• Images
• Manned Exploration
• National Space Agencies
• Spacecraft and Satellite Design@

• Blogs@
• Chats and Forums
• Data Archives
• Dictionaries@
• Education
• Events

• History
• Institutions
• News and Media
• Organizations
• Personal Pages
• Software

• BOTW UK Directory: Ireland: Science: Astronomy 
• BOTW UK Directory: Science: Astronomy and Space 
• Kids and Teens: Science and Math: Science: Astronomy and Space 

• 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.
• Eyes on the Solar System  - Interactive 3D virtual tour of the solar system offering different types of views and a photo mode for images.
• 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.
• Planetary Biology  - Project developing a Windows based software which allows astronomers and other interested parties to imagine and explore an exoplanet's environment.
• Russian Space Web  - Information provided on rockets, spacecraft, people, and a chronology of Russians in space.
• Scale of the Universe  - Interactive online resource for comparing the sizes of objects in the universe.
• Sea and Sky  - Offering information about the sea and the universe. With news, updates and other related facts.
• Sky View Café  - Offers configurable simulated views of celestial bodies as well sky maps, star charts, calendar, and tables.
• 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.
• Vatican Observatory  - Astronomical research and educational institution supported by the Holy See. Includes FAQ, research highlights and publication information.