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)
https://500kc.com/
The 500 KC Amateur Radio Experimental Group, run by Ralph M. Hartwell II, documents the WD2XSH experimental station network operating in the 600-meter (500 kHz) band, including reception reports, station maps, frequency assignments, and FCC regulatory updates. A fascinating resource for low-frequency amateur radio enthusiasts, it captures the years-long effort by American hams to secure the new 630-meter band allocation from the FCC.
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://harc.net/
The Huntsville Amateur Radio Club (HARC) is a 501(c)(3) nonprofit based in Huntsville, Alabama, dedicated to educating and training members in amateur radio with a focus on emergency communications support. The site offers access to club resources including a newsletter, repeater and net information, a classifieds section, SKYWARN and ARES/RACES emergency programs, and a DX club.
http://magicrepeater.net/
The official web presence of M.A.G.I.C. (Minnesota Amateur Group of Independent Communicators), a ham radio club operating multiple repeaters across the St. Paul, Hugo, Foreston, and North Branch areas of Minnesota. Visitors will find repeater frequency details, band plans, ham radio links, scanner resources, shortwave links, DMR network info, and announcements for club tailgate events.
http://sm0vpo.altervista.org/
Harry Lythall (SM0VPO/G4VVJ) shares an extensive collection of homebrew amateur radio construction projects, covering everything from QRP transmitters and receivers to circuit boards, oscillators, and RF amplifiers. The site is a treasure trove for hands-on ham radio enthusiasts, packed with schematics, datasheets, calculators, and practical guides for building your own radio equipment.
https://bacteria.icu/
Stanislaus runs this enthusiastically nerdy site dedicated to prokaryotes and bacteria, complete with a gallery, wiki, and guestbook hosted on Neocities. The playful 'Bacteria Intensive Care Unit' theme and self-described obsession with microbiology make it a charming corner of the web for fellow microbe enthusiasts.
https://john.pane.net/
John Pane is a Ph.D. computer scientist and senior researcher at RAND Corporation whose homepage highlights his work in education technology and personalized learning. A standout feature is his astrophotography gallery, showcasing personal photos of stars, nebulae, comets, and a solar eclipse, which gives the site a compelling scientific hobby dimension.
http://astronomylinks.com/
astronomyLINKS is a comprehensive curated directory of over 1000 astronomy and space-related links organized into categories like astrophotography, black holes, deep-sky objects, telescopes, and astronauts. Running since 2002, it serves as a one-stop portal for amateur and professional astronomers seeking resources, news, software, and community connections from around the world.
http://williamson-labs.com/
Williamson Labs is a comprehensive electronics tutorial site covering foundational topics like transistors, op-amps, 555 timers, and circuit design for learners at various levels. It serves as a structured educational reference for anyone looking to understand basic and intermediate electronics concepts through instructional content.
https://qsl.net/sv2ael/sv2ael.files/qsls_flags/qsl_flags1.htm
SV2AEL is a Greek amateur radio operator's gallery showcasing QSL cards and national flags organized alphabetically by DX country, complete with call sign prefixes, continents, and CQ zones. A comprehensive reference for ham radio enthusiasts interested in DX contacts and international QSL card collecting.