Astronomy & Space
390 sites
https://nineplanets.org/amateur-astronomical-observatories
The Nine Planets hosts a curated list of amateur astronomical observatories built by individual hobbyists, compiled by the site owner during research for their own backyard observatory project. Visitors will find practical inspiration and design ideas ranging from simple roll-off roof builds to more complex dome structures, all set within a broader astronomy reference site covering planets, stars, comets, and equipment guides.
https://sostrata.neocities.org/sostratapersonal
Elia Rowan's personal site is a rich mix of worldbuilding and space enthusiasm, featuring original fictional universes, a Kerbal Space Program journal, and a playful page about Venus alongside creative writing projects. The site has a distinctly old-web feel with hundreds of collected blinkies, stamps, and web badges alongside deep speculative content about the structure of imagined cosmologies.
https://projectpluto.com/
Project Pluto offers a suite of astronomical software tools for both amateur and professional astronomers, including the well-known Find_Orb orbit determination software, Sat_ID for identifying artificial satellites, and the Guide star charting DVD. The site provides free online versions of many tools alongside downloadable software, C/C++ source code, and reference resources like lunar phase calendars and asteroid observer tools.
http://nhastro.com/
The New Hampshire Astronomical Society is a volunteer-run nonprofit dedicated to public astronomy education through skywatches, club meetings, and outreach to schools and libraries across New Hampshire. Visitors can find upcoming observing events, solar and lunar data, a telescope lending program, and resources for amateur astronomers throughout the region.
https://solarviews.com/cap/index
Created by Calvin J. Hamilton, Views of the Solar System is an expansive photo gallery cataloging images of every planet, moon, asteroid, comet, and deep-space phenomenon in our solar system and beyond. With hundreds of categorized photos organized by target and feature type, including spacecraft missions like Cassini, Voyager, and Curiosity, it serves as a rich visual reference for space enthusiasts and students alike.
https://aurorawatch.lancs.ac.uk/
AuroraWatch UK is a free alert service run by scientists at Lancaster University's Space and Planetary Physics group, notifying users when the aurora borealis might be visible from the UK. The site offers real-time magnetogram plots, activity stackplots, a map, and multi-channel alerts via email, Twitter, Telegram, and more.
https://hms.sternhell.at/hms.php?country=Austria&lang=English&page=pages%2Fmain
How Many Stars is a long-running international citizen science project now in its 22nd year, dedicated to measuring light pollution and night sky visibility through naked-eye observations submitted by volunteers worldwide. Participants count visible stars in specific regions and submit their reports, contributing to a global dataset tracking the degradation of dark skies over time.
http://blackcanyonastronomy.com/
The Black Canyon Astronomical Society (BCAS) is an amateur astronomy club serving Western Colorado, offering public meetings, star parties, dark sky preservation efforts, and outreach programs to schools and community groups. The site features a calendar of events, astrophotography gallery, observing highlights, and information on joining the Astronomical League.
http://lightandmatter.com/binosky/binosky.html
BinoSky, created by Benjamin Crowell, is a comprehensive guide to stargazing with binoculars, organizing the best celestial objects to observe by region of sky and season. Visitors will find detailed entries on open clusters, globular clusters, nebulae, and galaxies visible through binoculars, complete with sky maps and a data table compiled by SEDS contributor Hartmut Frommert.
https://whatcomastronomy.org/
The Whatcom Association of Celestial Observers (W.A.C.O.) is a community astronomy club founded in 1988 in Bellingham, Washington, dedicated to making amateur astronomy accessible and enjoyable. The site offers a calendar of meetings, member resources, observing programs, photos, and local astronomy links for the Pacific Northwest region.