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://www.qsl.net/kb1bot/index.html
The Connecticut DX Association (CTDXA) is a ham radio club founded in 1983 dedicated to long-distance international amateur radio contacts, known as DXing. The site includes member listings, meeting details at ARRL Headquarters in Newington CT, award information, and links to DX bulletins and DXpedition resources.
http://cyclonejim.com/
Dedicated to the late storm chaser Jim Leonard (1950-2014), known as Cyclone Jim, this site serves as a memorial and archive for his decades-long career intercepting hurricanes and typhoons around the world. Visitors can explore his biography and access his extensive stock video and photo collection through his YouTube channel, with licensing information available for professional use.
http://kellysky.net/
Al Kelly's dedicated astrophotography site showcases stunning CCD images of galaxies, nebulae, star clusters, and solar system objects captured with equipment including a Celestron CGE 1400 telescope and Orion Parsec 8300C camera. Beyond the image galleries, the site offers a CCD instruction manual, a G2V color calibration article, and links to fellow astrophotographers, making it a valuable resource for amateur astronomers interested in CCD imaging.
https://w5yi.org/
W5YI Licensing Services Inc. is a nationwide Volunteer Examiner Coordinator (VEC) offering full-service amateur radio licensing support, including exam sessions, vanity call sign applications, license renewals, and club station licenses. The site also features a youth licensing program that covers FCC fees for applicants aged 25 and under, making it a practical hub for anyone pursuing or maintaining a ham radio license.
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.
http://robgendlerastropics.com/
Robert Gendler's astrophotography site showcases a stunning image gallery of astronomical objects alongside essays on 140 popular celestial subjects and a beginner's astronomy primer. The site also features technical articles on advanced imaging techniques like hydrogen alpha color imaging and Photoshop mosaics, plus information about Gendler's published books on astronomy.
https://craq.club/
The Club Radio Amateur de Québec (CRAQ), founded in 1926 and celebrating its 100th anniversary, is one of Quebec's oldest amateur radio clubs, offering membership resources, technical articles, repeater information, QSL cards, and licensing exam preparation. The site includes live HF operation logs, contest schedules, D-STAR networking stats, and a rich archive of club activities and events.
http://amasci.com/amateur/elehob.html
Bill Beaty's Electronics Hobbyist page is a sprawling directory of resources for electronics enthusiasts, covering surplus suppliers, schematics archives, robotics, embedded processors, Tesla coils, and electrostatics projects. It also includes Bill's own articles on electricity fundamentals, common misconceptions, and hands-on science experiments, making it a rich hub for both beginners and seasoned hobbyists.
https://siriuslookers.org/
Sirius Lookers is a free, dues-free amateur astronomy club based in Sedona, Arizona, welcoming anyone with an interest in looking up at the night sky. The site lists monthly meeting schedules at the Sedona Public Library, upcoming star parties, viewing locations, moon phases, and links to dark sky resources and other astronomy clubs.
https://users.usinternet.com/n0flq
Collin Witwer (N0FLQ) is a ham radio operator from Minneapolis, Minnesota who built this sprawling personal homepage packed with categorized links covering everything from ham radio and shortwave to space, electronics, weather, and beyond. The site serves as both a personal hub and a massive curated web directory, with a QSL card, live webcam, and links to local Minnesota resources making it a genuine snapshot of late-1990s hobbyist internet culture.