Astronomy & Space
396 sites
https://astronomy-links.net/
Clark M. Thomas of Roanoke, VA has assembled one of the most comprehensive astronomy link directories on the old web, covering everything from cosmology and black holes to amateur CCD imaging and deep sky observing. Alongside the curated links, Clark shares his own original essays on topics ranging from dark matter and primordial black holes to UFO phenomena and climate change, making this both a jumping-off point and a destination in itself.
https://3towers.com/
The Grasslands Observatory, owned by Tim Hunter and directed by James McGaha, is a working astronomical observatory in operation since 1985 that offers an extensive image gallery covering Messier objects, Arp galaxies, Barnard objects, Caldwell objects, comets, asteroids, and more. With decades of astrophotography, essays on getting started in amateur astronomy, and remote telescope operations, this site is a rich resource for serious backyard astronomers.
http://assabfn.co.za/
The ASSA Bloemfontein Centre is a non-profit astronomy club based in Bloemfontein, South Africa, welcoming enthusiasts of all experience levels with interests ranging from astrophotography to telescope making. The site chronicles their annual Free State Star Party events spanning over a decade, shares resources including radio segments on stars and planets, and preserves local astronomical history such as the historic Lamont-Hussey Observatory.
https://www.shreveportastronomy.com/
The official website of the Shreveport-Bossier Astronomical Society, a non-profit astronomy club active in Louisiana since 1959, offering free public observing nights, access to the historic Shreveport Observatory, and resources covering astrophotography, variable star observation, and more. Visitors can find meeting schedules, membership info, observing certificates, and a curated list of astronomy links ranging from NASA to Sky and Telescope Magazine.
https://briankoberlein.com/
Brian Koberlein is an astrophysicist and author who writes accessible, research-based blog posts covering topics like black holes, dark matter, solar flares, and planetary formation. The site serves as a hub for his ongoing science communication work, with an archive of posts and a newsletter for readers who want regular cosmic updates.
https://ads.harvard.edu/books
The NASA Astrophysics Data System (ADS) Virtual Library offers free online access to a curated collection of astronomy and astrophysics books, ranging from Copernicus's 1543 classic to modern astrophysics textbooks. Researchers and enthusiasts alike can browse and print foundational works on celestial mechanics, stellar astrophysics, lunar science, and solar physics from leading institutions like Harvard and the Lunar and Planetary Institute.
http://wiki.solarsails.info/index.php/Main_Page
SolarSailWiki is a community-edited wiki dedicated entirely to solar sail spacecraft, covering the science of light pressure, mission histories, technologies, and future applications for propellantless space travel. With sections on design, real-world missions like the Planetary Society's LightSail, books, papers, and conferences, it serves as a comprehensive reference for anyone fascinated by this elegant form of space propulsion.
https://cometchasing.skyhound.com/
Comet Chasing, maintained by Skyhound, provides monthly up-to-date observing guides for telescopic comets visible this month, complete with finder charts, observing synopses, and brightness predictions tailored to your latitude and equipment. It covers current comets like Kreutz sungrazers and PANSTARRS discoveries, making it an invaluable tool for amateur astronomers who want to hunt comets visually or through imaging.
https://centexastronomy.org/
The Central Texas Astronomical Society operates Meyer Observatory and the Turner Research Station near Clifton, Texas, hosting public open houses and member star parties with large-aperture telescopes. Their mission spans stargazing outreach, astrophotography, astronomy education, and research for both newcomers and experienced observers in the Central Texas region.
https://webbdeepsky.com/
The Webb Deep-Sky Society is an international organization founded in 1967 bringing together amateur and professional astronomers devoted to observing double stars and deep-sky objects such as galaxies, nebulae, and clusters. Members receive access to publications like The Deep-Sky Observer, monthly featured objects, star atlases, and invitations to annual meetings and star parties.