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://asliclub.org/
The Astronomical Society of Long Island (ASLI) is an amateur astronomy club that holds weekly meetings at the Vanderbilt Planetarium in Centerport, NY, with Zoom broadcasts available for remote attendees. Visitors can join observing sessions, get telescope advice, and explore the night sky alongside dedicated hobbyist astronomers without needing to own any equipment.
http://okcastroclub.com/
The Oklahoma City Astronomy Club, founded in 1958, is a 501(c)(3) nonprofit serving amateur astronomers in the Oklahoma City area with star parties, public outreach, an observatory, and the prestigious Okie-Tex Star Party. Members enjoy access to club telescopes, a library, a newsletter called the Gazette, and opportunities to contribute real scientific data to the astronomical community.
https://www.qsl.net/i6ypk
I6YPK's workshop page showcases homebrew HF transceiver projects built in collaboration with I6WJB, including double and triple conversion designs covering 0-30 MHz continuous coverage. The site also features HP spectrum analyzer and frequency standard resources, making it a valuable technical reference for radio electronics builders.
https://ve7sar.blogspot.com/2026/03/the-sarc-communicator-march-april-2026.html
The digital home of the SARC Communicator, the newsletter of Surrey Amateur Radio Communications in Surrey, BC, this blog publishes bi-monthly issues packed with homebrew projects, DX expedition reports, radio equipment reviews, and amateur radio history. Each edition offers hands-on technical content alongside club news, making it a rich resource for ham radio enthusiasts of all experience levels.
http://cometography.com/
Cometography.com is a scholarly reference site originally built by Gary W. Kronk, companion to his six-volume Cambridge University Press book series, offering in-depth historical data on periodic and notable comets throughout history. Now maintained by José J. Chambó, the site preserves and expands Kronk's decades of comet research for astronomers and enthusiasts alike.
https://cobaltpet.blogspot.com/
Run by a Northern California hobbyist known as 'weatherall', this blog chronicles shortwave and mediumwave radio listening with detailed reception reports, SIO signal quality codes, station identifications, and portable receiver reviews. Covering international broadcasters, number stations, utility signals, NDB logs, and DXing tips, it's a thorough record of the hobby for fellow shortwave enthusiasts.
https://math.cowpi.com/
Math @ CowPi offers a curated collection of math tools and resources, including interactive GeoGebra sketches, a system-of-equations solver for up to five unknowns, and a full annotated text of Edwin A. Abbott's classic novel Flatland. Visitors will also find organized math links spanning algebra, geometry, trigonometry, and calculus, making it a handy reference for students and enthusiasts alike.
https://wh6ko.net/
Karen and Kevin's personal homepage chronicles their amateur radio adventures as licensed operators WH6CWD and WH6KO, originally from Hawaii and now settled in Oregon. The site blends ham radio content with personal memories, pet photos, and snapshots of Pacific Northwest life including multiple winters of notable snowfall.
https://academics.cehd.umn.edu/hatch/default.htm
Produced by the staff of the James Ford Bell Museum of Natural History at the University of Minnesota, this reference site covers the distribution and ecology of native and introduced fish species found in Minnesota. Curated by Andrew M. Simons and Jay T. Hatch, it serves as both a scientific resource and a public education tool tied to the museum's fish collection.
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.