Science & Nature
1439 sites
Subcategories:
- Astronomy & Space (396)
- Chemistry (8)
- Earth Sciences (26)
- Biology (79)
- Physics (30)
- Mathematics (59)
- Weather & Climate (104)
- Amateur Radio (682)
- Electronics (47)
http://inconstantmoon.com/
Inconstant Moon offers nightly multimedia tours of the lunar surface, complete with maps, photos, animations, and music to guide both beginners and experienced observers through the Moon's craters, seas, and phenomena. A Scientific American Sci/Tech Web Awards honoree and BBC Space featured site, it includes a Cyclopedia Selenica and Selenographia making it a comprehensive reference for lunar astronomy.
https://msuarc.egr.msu.edu/
The MSU Amateur Radio Club (W8SH) has been connecting students to ham radio at Michigan State University since 1919, with roots tracing back to the founding of what would become WKAR public radio. The site offers club membership info, repeater details, and original tools like POTAVis and FoxHuntr built by club members to help hams visualize POTA activations and practice radio direction finding.
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
HyperPhysics is a sprawling educational reference site from Georgia State University covering virtually every topic in physics through an interconnected web of concept maps and concise explanations. Visitors can explore everything from classical mechanics and thermodynamics to quantum physics and relativity, with formulas, diagrams, and worked examples throughout.
https://mainearrl.org/
The official Maine Section page for the American Radio Relay League covers everything local hams need, including district info, repeater listings, emergency communications nets, and an upcoming hamfest convention in Augusta. Resources for mentors (Elmers), club listings, EMCOMM testing, and multiple nets like the Maine Seagull Net and Maine Public Service Net make this a practical hub for amateur radio operators across the state.
https://nccc.cc/
The Northern California Contest Club (NCCC) is an ARRL-affiliated amateur radio club founded in 1970, with over 300 active members dedicated to competitive radio contesting, DXing, and antenna construction. The club boasts an impressive record of contest wins including 17 ARRL Sweepstakes unlimited club competition victories and has been running the California QSO Party since 1974.
https://theworld.com/~jgarrett
John Garrett's quirky early-web homepage introduces himself with offbeat humor and references his work as a sound man, along with a link to listening to 'voices from outer space.' The site has a charmingly chaotic old-web personality with scattered sections labeled 'Things N Stuff' and 'Point and Click,' making it a fun time capsule of early internet personal pages.
http://iki.rssi.ru/mars96/mars96hp.html
An official scientific summary of the ill-fated Mars-96 mission, a Russian robotic spacecraft that failed to reach Mars after a rocket malfunction in November 1996 sent it back into Earth's atmosphere. Published by the Space Research Institute and edited by Dr. A. Zakharov, the site covers the mission's scientific goals, orbiter payload, small surface stations, and penetrator instruments in detailed technical depth.
https://f1rum.fr/
F1RUM's blog is a French amateur radio enthusiast's personal journal covering topics like Meshtastic mesh networking, Morse code learning challenges, SOTA field operations, SDR hardware, and digital modes like MFSK. The site also includes a logbook and digimap, and participates in the Fediverse.Radio web ring, making it a genuine hub for the radioamateur community.
https://www.qsl.net/k6ls/test.html
Phil (K6LS) has assembled an extensive directory of links to test and measurement equipment manufacturers, dealers, and related resources for amateur radio and electronics hobbyists. The collection spans commercial makers like Tektronix, Fluke, and Rohde & Schwarz alongside used equipment dealers, repair services, and homebrew resources, making it a useful reference for anyone sourcing or servicing RF test gear.
https://qsl.net/kc0dbu/post30.htm
Explorer Post 30 is a youth scouting group based in Springfield, Missouri with a focus on amateur radio and related activities. The site links to ARRL and QSL.net resources, features post event photos, and connects members with local and area clubs.