Science & Nature
1413 sites
Subcategories:
- Astronomy & Space (390)
- Chemistry (7)
- Earth Sciences (24)
- Biology (76)
- Physics (29)
- Mathematics (51)
- Weather & Climate (100)
- Amateur Radio (681)
- Electronics (45)
http://currentsky.com/
Bob Riddle's 'Qué tal in the Current Skies' is a long-running amateur astronomy site that began in the late 1980s as posts to the Big Sky Telegraph BBS and evolved over 30+ years into a web resource covering Earth and Space topics. The site now serves as a transitional landing page pointing visitors to his continuing work on Substack, with archived daytime and nighttime sky photos, calendar data, and astronomical observations.
https://atn-tv.org/
The Amateur Television Network (ATN) is a national organization for ham radio operators interested in amateur television transmission, with regional chapters across Arizona, California, Colorado, and beyond. The site features decades of meeting photos, repeater coverage maps, membership rosters, streaming events, and information on digital ATV technology.
http://aoas.org/
AOAS (Amateur Observers' Astronomical Society) is a club website for astronomy enthusiasts, likely featuring meeting information, observing events, and resources for stargazers. The domain and structure suggest a regional astronomy club serving members interested in telescopes, sky-watching, and community observing sessions.
https://cqrlog.com/
CQRLOG is a feature-rich ham radio logging application for Linux, built on a MySQL database and supporting over 140 radio types via hamlib integration. The site serves as the official home for the software, offering downloads, user forums, DX cluster support documentation, and updates from the development team.
http://jap.hu/electronic/rf.html
Peter's RF schematics page is a technical reference collection of radio frequency circuit diagrams spanning receivers, transmitters, and transceivers across a wide range of frequencies from 27MHz to 1GHz. Hobbyists and engineers will find schematics for superregenerative receivers, FM audio transmitters, walkie-talkies, SAW-based designs, and datasheets for chips from major manufacturers like Silicon Labs, HopeRF, and Texas Instruments.
https://empslocal.ex.ac.uk/people/staff/mrwatkin
Matthew R. Watkins is a mathematician and honorary researcher at Exeter University whose site centers on his celebrated 'Secrets of Creation' trilogy, making analytic number theory and prime numbers accessible to general audiences. The site also features a number theory and physics archive, prime number resources for beginners, and links to his eclectic range of interests including parapsychology, the I Ching, and psychogeography.
https://tornadobob.com/
Bob Conzemius documents his storm chasing and aurora hunting adventures on this personal site, which includes dedicated sections for aurora chases, storm chases, and weather research. The dual focus on severe weather and Northern Lights photography makes it a unique destination for weather enthusiasts and aurora chasers alike.
https://w9smc.com/
The Society of Midwest Contesters (SMC) is a club uniting amateur radio operators across the Midwest who compete in radio contesting events, with resources covering membership, awards programs, VHF contesting, and call area records. The site features a championship medals leaderboard, annual SMC Fest gathering details, contest calendars, and a contesting library making it a hub for competitive ham radio operators in the region.
https://w8dc.org/
The Grand Rapids Amateur Radio Association (GRARA), callsign W8DC, is a Michigan-based amateur radio club offering meetings, license testing sessions, repeater access, and annual events like Field Day and a Hamfest. The site keeps members informed with meeting announcements, minutes, newsletters, and membership information for the greater Grand Rapids area.
https://www.qsl.net/k0usa
The Ak-Sar-Ben Amateur Radio Club is a ham radio club based in Omaha, Nebraska, serving the greater Council Bluffs area with activities including VE testing, Field Day, SKYWARN weather spotting, and ARES emergency communications. The club's homepage serves as a gateway to member resources, repeater info, hamfests, and ARRL-affiliated programming.