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://r-knott.surrey.ac.uk/Fibonacci/fib.html
Dr Ron Knott's comprehensive mathematics resource, hosted by Surrey University since 1996, covers Fibonacci numbers, the golden ratio, and their appearances in nature, art, geometry, architecture, and music. Packed with interactive calculators, puzzles, investigations, and dozens of linked pages exploring everything from Lucas sequences to phyllotaxis, this is one of the oldest and most thorough maths sites on the web.
http://xjubier.free.fr/en/site_pages/solar_eclipses/ASE_1984_GoogleMapFull.html
Xavier Jubier's interactive Google Map traces the path of the May 30, 1984 annular solar eclipse across the USA, offering a detailed geographic visualization of this historical celestial event. Part of a larger solar eclipse resource site, this page lets visitors explore the eclipse path with precision using interactive mapping technology.
https://rarclub.net/
The Richmond Amateur Radio Club (RARC) is a Virginia-based ham radio organization with sections covering licensing resources, club repeaters, nets, and public service events. Notable activities include Field Day operations, satellite workshops, balloon chase teams, and volunteer coordination for local community events like the Monument Avenue 10k.
https://asgh.org/legacy/links.htm
The Astronomical Society of Greenwich Hills (ASGH) maintains this curated links page connecting amateur astronomers to periodicals, regional astronomy clubs, observatories, equipment suppliers, and NASA educational resources. A thorough reference hub for stargazers in Connecticut and New England, it lists dozens of affiliated clubs and organizations alongside tools for both hobbyists and kids.
https://www.mathsisfun.com/links/external.html
A curated collection of external math links from MathIsFun, organized into math websites, fun puzzle sites, and schools, covering everything from algebra and geometry to game theory and Pi. Created by Rod Pierce, this page serves as a springboard to some of the web's best math resources for students, teachers, and curious minds alike.
https://softkittypa.ws/
Lexi's personal homepage blends astrophotography, programming projects, and game corruption experiments into a vibrant, technically impressive old-web-style showcase. Visitors can browse her astrophotography gallery, explore open-source tools she built, and see wild ROM corruption screenshots from titles like Mario Kart Wii and Celeste.
http://discovercircuits.com/
DiscoverCircuits.com, run by engineer Dave Johnson P.E., is a massive repository of over 45,000 free electronic circuits and schematics cross-referenced across 500+ categories for engineers, hobbyists, inventors, and students. Online since 2002, it serves as a go-to reference for quick design ideas, circuit solutions, and component resources covering an enormous breadth of electronic applications.
https://spaceflightnow.com/news/n0406/03grbmilkyway
Spaceflight Now is a dedicated space news outlet covering breaking stories from NASA missions, rocket launches, and astronomical discoveries, including this article presenting evidence of a gamma-ray burst within the Milky Way galaxy. The site features premium video content covering events like the Cassini Saturn arrival, Mars rover updates, and Hubble Space Telescope news, making it a rich hub for space enthusiasts and science followers.
https://allstarlink.org/
AllStarLink is a non-profit network connecting amateur radio repeaters, remote base stations, and hot spots worldwide using Voice over Internet Protocol built on the open-source Asterisk PBX platform. Ham radio operators can set up their own nodes on hardware as accessible as a Raspberry Pi, linking to thousands of other stations globally with full-duplex audio and Echolink compatibility.
http://cimss.ssec.wisc.edu/goes/goesdata.html?fbclid=IwAR1tJwdbaRkZL3OS55qttm0KXOx16pK2Mw2uGiGqFSr_WDBDL4FuR8l7eEE
Maintained by Tim Schmit at CIMSS/SSEC (University of Wisconsin-Madison), this comprehensive link directory aggregates GOES satellite imagery sources from NOAA, NASA, and international agencies including Brazil, Mexico, Chile, and Canada. Visitors can access real-time ABI imagery across all bands, mesoscale sectors, full-disk views, and animated GIFs from dozens of platforms covering both GOES-East and GOES-West.