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://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://irts.ie/cgi/index.cgi
The Irish Radio Transmitters Society (IRTS) is Ireland's national amateur radio organization, offering licensing guidance, club directories, contest calendars, and membership services for ham radio enthusiasts across the country. Affiliated with the International Amateur Radio Union, the site serves as a central hub for Irish operators with resources covering repeaters, beacons, DXCC standings, awards, and emergency communications.
https://planetary.chem.tufts.edu/Phoenix/index.html
A page dedicated to NASA's Phoenix Mars Scout Mission, hosted on a Tufts University chemistry server, featuring launch videos including a close-up NASA recording and a team footage from Cocoa Beach in August 2007. It offers a glimpse into the excitement surrounding the Phoenix lander's launch, which went on to study the Martian arctic soil.
http://astrophysical.org/
Astrophysical.org is a scientific popularization site run by Istituto Scientia, covering astrophysics and astronomy with sections on stars, magnitude, an online planetarium, and the SAO star catalog. Visitors can explore topics from stellar spectral classification to cosmology, with links to companion site Astrometry.org for celestial mechanics content.
http://feraphotography.com/
Bob and Janice Fera share their passion for astrophotography on this dedicated site showcasing celestial images captured by the husband-and-wife team. Visitors can explore their collection of deep-sky and astronomical photographs, making it a compelling destination for amateur astronomy and night-sky imaging enthusiasts.
https://qrp-labs.com/2-uncategorised/44-qrp-labs-shop.html
QRP Labs is a shop and resource hub for amateur radio enthusiasts, offering a wide range of kits including CW transceivers, digital transceivers, GPS receivers, WSPR/QRSS transmitters, and high-altitude balloon trackers. The site features an impressive catalog of homebrew-style radio kits catering to QRP (low power) operators, with supporting documentation, newsletters, and community resources.
https://gadgeteer.us/
Bill Meara's Gadgeteer site is a celebration of electronic homebrewing, centered on ham radio projects including DSB and SSB rigs, tube receivers, and QRP builds alongside a popular podcast called SolderSmoke. The site also ventures into amateur astronomy, model rocketry, and kite aerial photography, making it a rich destination for technically adventurous hobbyists.
https://solorb.com/elect
FC's Electronic Circuits is a sprawling hobbyist archive packed with schematics and project descriptions covering everything from solar charge controllers and LED circuits to tube amplifiers, Geiger counters, and amateur radio gear. With dozens of original circuit designs, Arduino projects, and links to related ham radio and electronics builders, this site is a goldmine for DIY electronics enthusiasts.
http://ee.cleversoul.com/
The EE Compendium is a comprehensive reference hub for electronics engineers, students, and hobbyists covering microcontrollers, embedded systems programming, and hardware development tools. Visitors will find curated links and resources spanning popular platforms like Atmel AVR, Microchip PIC, Intel 8051, and Freescale chips, along with project kits, robotics, software compilers, and career resources.
https://his.com/~jrusso/ham.html
Jim and Karen's joint ham radio page for callsigns W4KRN and K4JJR features their station setup, ham radio links, and a reference to the Dayton 2000 hamfest. The site also participates in the Amateur Radio Webring and includes a local weather widget for Warrenton, Virginia.