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://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.
http://trx-manager.com/
TRX-Manager, created by Laurent F6DEX, is a CAT control, DXing, and logging software package supporting nearly 150 transceivers including models from Yaesu, Kenwood, Icom, and Elecraft. Though distribution has been discontinued, the site still provides updates for registered users and bilingual support in both English and French.
http://astrometry.org/
Astrometry.org is an educational resource by Istituto Scientia dedicated to popularizing astrometry and celestial mechanics, two of astronomy's oldest classical branches. Visitors can explore topics like star positions, orbital mechanics, the SAO star catalog, and an online planetarium, with historical context tracing these sciences from ancient Greece through Galileo and Newton.
https://www.qsl.net/kc0afx
Oleksandr Dzyubuk (callsign KC0AFX, home call UX7CQ) runs this site from Cherkassy, Ukraine, offering handmade CW Morse keys for sale alongside information about his ham radio activities and local radio communication work. The site also features a radio museum showcasing vintage USSR radios and receivers, plus sections on Ukrainian culture, power tubes, relays, and RF components.
https://jessystems.com/
Pete Juliano, N6QW, shares decades of hands-on ham radio construction experience through detailed homebrew projects covering QRP and QRO SSB transceivers, linear amplifiers, and PIC microcontroller applications. A licensed ham since 1959 with multiple callsigns, Pete also documents restorations of classic rigs like the Heathkit HW-101 and Collins KWM2, plus publications in QRP Quarterly.
http://w5auu.org/
A ham radio operator's personal site identified by the W5AUU callsign, redirecting visitors to an updated location. The W5 prefix places this operator in the Texas/Oklahoma/Louisiana/Mississippi/Arkansas region, making it a regional amateur radio resource.
https://qsl.net/wa5mc
The Atchafalaya Amateur DX Association Inc. (AADXA) is a ham radio club based in Amelia, Louisiana, with a full organizational presence including officer listings, membership applications, meeting minutes, newsletters, and repeater information. Developed by Guy R. Morrison (WA5MC), the site also features field day photos, a guestbook, and club constitution documents, making it a solid hub for local amateur radio enthusiasts.
http://stormgasm.com/
Stormgasm is the storm chasing hub of Jim Bishop, Juston Drake, and Simon Brewer, featuring dramatic tornado videos, supercell photography, hurricane footage, and storm chase galleries. Visitors can browse or purchase stock footage from real-world chases across Tornado Alley, making it a go-to resource for weather enthusiasts and filmmakers alike.
https://www.qsl.net/kb9ocq/index2.html
KB9OCQ's personal ham radio hub offers a comprehensive collection of links and resources covering repeater directories for Indiana cities, Morse code practice, shortwave radio, VHF/UHF news, and emergency services. The site reflects the classic old-web amateur radio community spirit, complete with callsign lookups, hamfest listings, CW abbreviations, and a banner exchange for fellow ham operators.
http://exoplanets.org/
The Exoplanet Orbit Database at exoplanets.org is a scientific reference cataloging confirmed exoplanets with detailed orbital data, maintained by researchers affiliated with the California Planet Survey. Visitors can explore interactive data tables and plots, search the full database of confirmed planets and Kepler candidates, and read methodology documentation covering the team's approach to curating high-quality planetary orbits.