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://www.qsl.net/mvarg
The Mystic Valley Amateur Radio Group is a club based in eastern Massachusetts that meets monthly at Tufts University in Medford, welcoming anyone interested in the amateur radio hobby. The site lists club officers, repeater information, and a variety of ham radio links including ARRL resources, emergency management contacts, and local net listings.
http://cactus-intertie.org/
The Cactus Intertie System is a private UHF amateur radio network established in 1971, spanning large portions of the American Southwest and beyond through a web of remotely controlled base stations linked by full duplex RF. Run by Cactus Intertie, Inc., a 501(c)(3) nonprofit, the site covers membership, affiliate clubs, technical support, educational materials, and the network's extensive history across multiple states.
http://nags.net/
NAGS (Norske Amatørgeologers Sammenslutning) is the Norwegian association for amateur geologists, offering a comprehensive lexicon of Norwegian minerals, an index of articles from their geology magazine STEIN dating back to 1973, and listings of geology clubs across Norway. Visitors interested in rocks and minerals as a hobby will find this a rich hub for Norwegian earth science resources and community.
https://solarpower.guide/
Bob Robertson's hobby site is a sprawling reference on solar power, covering everything from basic definitions and how solar panels work to educational guides for kids and van-life solar setups. With dozens of articles on renewable energy topics, it reads like a one-man encyclopedia built by a retiree passionate about the subject.
https://planetmath.org/
PlanetMath.org is a collaboratively built mathematics encyclopedia where community members write and review entries covering a vast range of mathematical topics, all rendered in LaTeX. Hosted by the University of Waterloo and operated as a nonprofit, it offers both a subject index and alphabetical index, making it a serious reference hub for students, educators, and math enthusiasts.
https://gaac.us/
The Gloucester Area Astronomy Club (GAAC) is a casual, no-dues astronomy group founded in 2003 that meets monthly at the Lanesville Community Center in Gloucester, Massachusetts. The site features member photo galleries, ephemerides, aurora alerts, object rise/set times, and a calendar of events for anyone curious about the night sky.
http://hamradio.de/
Hamradio.de is a German-language community hub for amateur radio enthusiasts, offering a fleamarket for used equipment, forums, contesting resources, club directories, and software. With sections dedicated to awards, DX, and contests, it serves as a comprehensive gathering point for the German-speaking ham radio community.
https://www2.mmm.ucar.edu/imagearchive
Hosted by UCAR's Mesoscale and Microscale Meteorology Laboratory, this archive provides a collection of meteorological case study images for researchers and forecasters. The Case Selection Kit Image Archive serves as a reference tool for selecting and studying atmospheric weather cases, making it a useful resource for those in the meteorological sciences.
https://mvas-ny.org/
The Mohawk Valley Astronomical Society (MVAS) has been connecting amateur astronomers in Central New York since 1989, offering public stargazing events, monthly meetings, and access to the Barton-Brown Observatory. The site includes astro photos, beginner tips, a newsletter archive, and a full schedule of club events and star parties for members and the public alike.
https://rmastro.com/
The Roper Mountain Astronomers (RMA) is a South Carolina astronomy club dedicated to sharing observational skills and astronomical knowledge with enthusiasts of all levels. The site features member astrophotos, club event listings, star parties, outreach programs, and highlights the historic 23-inch Charles E. Daniel Observatory refractor telescope.