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://sas-sky.org/
The Sangamon Astronomical Society is an astronomy club based in Springfield, Illinois, hosting monthly member meetings and an annual Illinois Dark Skies Star Party at Jim Edgar Panther Creek State Fish and Wildlife Area. The site offers membership information, a photo gallery, sky charts, maps, and links to resources like the Astronomical League and Night Sky Network.
https://flintriverastronomy.org/
The Flint River Astronomy Club (FRAC) is a Georgia-based astronomy club serving the Griffin area, hosting monthly meetings, public observing events at Indian Springs State Park, and club observing weekends at Joe Kurz WMA. Members have access to observing lists, tools, national awards, newsletters, and articles, making this a well-rounded hub for amateur astronomers in the region.
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.
http://astronautix.com/
Encyclopedia Astronautica is a massive reference work by Mark Wade covering the complete history of human spaceflight, with over 79,000 pages on rockets, spacecraft, astronauts, cosmonauts, launch sites, and engines from every spacefaring nation. Spanning Soviet secret programs to cancelled American spacecraft, it is one of the most comprehensive space history archives ever assembled on the web.
https://www.qsl.net/races
The national web presence for the Radio Amateur Civil Emergency Service (RACES), a program coordinating licensed amateur radio operators for emergency and disaster communications across the United States. Maintained by Ken Bourne (W6HK) since 1997, the site covers FCC RACES rules, news, volunteer protection information, and links to local RACES groups nationwide.
https://milwaukeeastro.org/
The Milwaukee Astronomical Society has maintained this richly detailed site for its membership, featuring multiple observatories, a deep archive of astrophotography spanning decades, and extensive beginner resources covering telescopes, stargazing tours, and celestial objects. With a historic club archive dating back to 1932, seasonal sky guides, variable star projects, and a member image showcase, this is a treasured hub for amateur astronomers in Wisconsin.
http://johncath.force9.co.uk/radio%20projects.htm
John Cath's radio project pages feature detailed amateur radio construction projects including a 17-page guide to building a 600W 50MHz solid state amplifier and a power splitter for 70cm. The site reproduces designs from RadCom magazine and the Radio Society of Great Britain, making it a useful reference for ham radio builders and experimenters.
https://www.qsl.net/k5wtx
K5WTX is the personal ham radio page of an Oklahoma City amateur operator and petroleum geologist with a callsign history dating back to 1973. The site covers vintage radio equipment collecting (Drake, Ten Tec, Hallicrafters), a collection of 50 antique telegraph 'bug' keys, weather station data, and Jeep trail exploration.
https://awkwardbotany.com/
Awkward Botany is an amateur botany blog written for the "phytocurious," covering plant families, weed profiles, horticulture, urban ecology, and plant identification with genuine depth and enthusiasm. Posts like the detailed breakdown of Liatris microcephala and the Weeds of Boise series showcase careful research and a love of plant science that will delight both beginners and seasoned plant nerds.
https://tapr.org/
TAPR (Tucson Amateur Packet Radio) is a longstanding amateur radio organization focused on advancing digital communications technology for ham radio operators. The site hosts decades of Digital Communications Conference papers, open hardware licenses, packet radio resources, and membership services for experimenters pushing the boundaries of amateur radio technology.