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)
http://joyofpi.com/pilinks.html
A comprehensive link directory dedicated entirely to pi, curated by David Blatner, author of 'The Joy of Pi,' covering everything from basic pi facts and digit downloads to pi music, pi history, and Pi Day celebrations. Visitors will find hundreds of categorized links spanning memorizing pi, calculating digits, pi mysteries, and even wacky pi fun, making it a go-to hub for pi enthusiasts of all levels.
https://observers.org/
The SF Bay Area Astronomy Connection (TAC) is an informal network for amateur astronomers across the greater San Francisco Bay Area, connecting observers without the formality of dues, officers, or bylaws. The site features an extensive list of observing sites throughout the region, curated observing lists, equipment guides, and resources for both beginners and seasoned stargazers.
https://gb.nrao.edu/~rmaddale/Education/OrionTourCenter/index.htm
Created by Ronald J. Maddalena of the National Radio Astronomy Observatory, this interactive tour guides visitors through the Orion constellation using five images captured at different wavelengths including optical, infrared, and radio. Visitors can explore astronomical objects in Orion, learn the mythology behind the hunter, take a glossary-supported test, and see how the same region of sky looks dramatically different depending on the telescope used.
https://trivalleystargazers.org/
The Tri-Valley Stargazers is an amateur astronomy club based in Livermore, California, serving the east San Francisco Bay Area with star parties, observing programs, loaner telescopes, and monthly public meetings featuring guest speakers. The site covers club membership benefits, viewing site details, upcoming events, and resources for hobbyist astronomers at all levels.
https://www.qsl.net/oz1gmq/hamlinks.htm
A sprawling directory of ham radio operator homepages from around the world, maintained by OZ1GMQ and featuring hundreds of links to individual amateur radio stations, clubs, repeater listings, and related resources. Visitors will find connections to emergency preparedness groups like RACES and ARES, regional radio clubs, and a wide variety of personal ham radio pages spanning multiple countries and call signs.
http://tornadohead.com/chases
Andy Fischer, known as Tornadohead, documents his storm chasing expeditions from 2001 through 2008 with individual chase accounts organized by year. The site includes cumulative maps tracking counties chased, observed supercells, and tornadoes across both the northern and southern plains.
http://bcares.org/
The Benton County Amateur Radio Emergency Service (BCARES) connects licensed ham radio operators in Benton County, Oregon who volunteer to provide emergency communications support for the Sheriff's Office and other local agencies during disasters. The site covers the group's capabilities including packet radio, voice, Morse code, and amateur television, and also lists upcoming license classes and examinations for those looking to join.
https://qth.com/ka9fox
Scott Neader KA9FOX runs this long-standing ham radio site out of La Crosse, Wisconsin, focused on contesting and DXing with resources like contest score rumors, QSL info, DX bulletins, and mailing list summaries. Featured in QST Magazine, RSGB Radio Communication, and numerous other publications, this site has been a go-to hub for contesters and DXers since April 1995.
https://eyesonjason.com/storm_chasing.html
Jason Searle, an optometrist and storm chaser, runs this hub dedicated to severe weather experiences, featuring a storm blog, video gallery, photographs, radar tools, and a storm glossary. It blends the thrill of firsthand storm chasing with practical resources for weather enthusiasts.
https://aprs.org/
The original home of APRS (Automatic Packet Reporting System), a ham radio digital communications protocol developed by Bob Bruninga (WB4APR) that allows operators to share real-time position, weather, messages, and event data over a single national channel. Now maintained for historical purposes, the site archives over two decades of APRS development including presentations, technical guides, satellite projects, and links to balloon launches and digipeater resources.