Astronomy & Space
390 sites
http://skymaps.com/
Skymaps.com, created by Kym Thalassoudis, offers free monthly sky maps and star charts in PDF format to help amateur and professional skywatchers explore constellations, planets, and comets. The site also features a curated store with planispheres, star atlases, telescopes, and astronomy books for all skill levels.
http://allthesky.com/
Created by Till Credner and Sven Kohle, AllTheSky.com is a stunning astrophotography gallery spanning comets, nebulae, galaxies, constellations, aurora borealis, and atmospheric phenomena. The site offers an impressive breadth of celestial imagery including nightscapes, 360-degree views, live all-sky feeds, and articles that make it a rich destination for astronomy enthusiasts.
http://mistisoftware.com/astronomy/index.htm
Misti Mountain Observatory is an amateur astronomy site featuring stunning astrophotography captured with a 32-inch Ritchey-Chretien telescope in Arizona, covering galaxies, nebulae, star clusters, and solar system objects. The site includes detailed equipment notes, film and CCD imaging data, conference listings, and even a specialized app that lets blind and visually impaired users explore astronomical images through musical tones.
http://robgendlerastropics.com/
Robert Gendler's astrophotography site showcases a stunning image gallery of astronomical objects alongside essays on 140 popular celestial subjects and a beginner's astronomy primer. The site also features technical articles on advanced imaging techniques like hydrogen alpha color imaging and Photoshop mosaics, plus information about Gendler's published books on astronomy.
http://www.actonastro.com/
ActonAstro is a hobbyist astronomy site built by a California stargazer who went from a beginner 60mm refractor to a full backyard observatory with a Celestron 9.25-inch scope. Visitors will find astrophotography galleries, equipment reviews, polar alignment guides, and personal weather station data, all rooted in a genuine passion for the night sky.
https://theastronomycafe.net/
An archived recreation of Dr. Sten Odenwald's legendary 'Astronomy Cafe' website from circa 2001, once a destination where a professional astronomer answered thousands of public questions about space, the universe, and infrared astronomy. The site preserves a nostalgic snapshot of early web science outreach, featuring Dr. Odenwald's books, his 'Ask the Astronomer' feature, and philosophical explorations of concepts like 'nothing' and the Big Bang.
http://ccas.us/
The Chester County Astronomical Society (CCAS) is a Pennsylvania-based non-profit bringing together amateur astronomers through monthly meetings, observing sessions, and public star parties for schools and civic groups. The site features an events calendar, member photography, planetarium show schedules at West Chester University, and resources for anyone interested in exploring the night sky.
https://astronomynotes.com/
Nick Strobel's Astronomy Notes is a comprehensive, free educational resource covering introductory astronomy topics from the scientific method and history of astronomy to planetary science, relativity, and telescopes. Originally created for college-level astronomy courses, the site has been widely copied across the web and is also available as a purchasable hardcopy book through Kendall Hunt.
http://bbastrodesigns.com/
Mel Bartels runs this personal hub covering amateur telescope making alongside his BBAstroDesigns venture and beekeeping with top bar hives. The site blends hands-on astronomical craftsmanship with natural observations like ice spikes, sun rainbows, and sun pillars.
https://avastronomyclub.org/
The Antelope Valley Astronomy Club (AVAC) is a nonprofit organization founded in 1982 to share the wonders of the night sky with families in northeastern Los Angeles County. Members range from beginners to advanced observers, and the club offers monthly meetings, school presentations, observing programs, and resources like telescope guides and DSO observing lists.