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/by2hit
The official web presence of the BY2HIT Amateur Radio Club at Harbin Institute of Technology in Harbin, China, reachable via the QSL.net callsign network. The site provides QSL card mailing information and serves as a landing page for this university-based ham radio club.
http://pictures.ed-morana.com/
Ed Morana's personal astronomy photo and video archive documents rare celestial events including total solar eclipses, Venus and Mercury transits, ISS transits, asteroid occultations, and the Northern Lights. The collection spans events from 2006 through 2024, with time-lapse composites and an Android app for ISS transit prediction making it a genuinely useful resource for amateur astronomers.
https://rfcafe.com/
RF Cafe is a comprehensive resource for RF and electronics engineers, offering formulas, reference data, vintage magazine archives, software tools, forums, and a massive parts and services directory. Running since 1996, the site blends technical depth with nostalgia, featuring scanned articles from classic publications like QST, Popular Electronics, and Radio-Craft alongside modern engineering utilities.
https://theworld.com/~jgarrett
John Garrett's quirky early-web homepage introduces himself with offbeat humor and references his work as a sound man, along with a link to listening to 'voices from outer space.' The site has a charmingly chaotic old-web personality with scattered sections labeled 'Things N Stuff' and 'Point and Click,' making it a fun time capsule of early internet personal pages.
http://www.severewx.com/
Built by meteorologists and storm chasers, Severewx.com covers tornadoes, severe thunderstorms, and storm chasing with firsthand chase reports, photo galleries, and educational weather science content. The site includes real-time weather forecasts, links to weather resources, and a firsthand account of the team's own tornado intercepts.
https://jarcnd.com/ham-radio-links
The Jamestown Amateur Radio Club in North Dakota maintains this extensive alphabetical directory of ham radio links, covering clubs, contests, equipment, licensing, repeaters, and DX resources from across the country. With hundreds of curated links organized A to Z, it serves as a comprehensive jumping-off point for amateur radio operators at any experience level.
http://wiki.solarsails.info/index.php/Main_Page
SolarSailWiki is a community-edited wiki dedicated entirely to solar sail spacecraft, covering the science of light pressure, mission histories, technologies, and future applications for propellantless space travel. With sections on design, real-world missions like the Planetary Society's LightSail, books, papers, and conferences, it serves as a comprehensive reference for anyone fascinated by this elegant form of space propulsion.
https://irlp.net/
The official home of the Internet Radio Linking Project (IRLP), a system that connects amateur radio repeaters around the world using Voice over IP technology. The site provides information, maps, node codes, frequencies, and technical details for ham radio operators looking to link into the IRLP network.
http://n4nw.org/
Amateur radio operator N4NW runs a personal weather station in North Stafford, Virginia, reporting live conditions using a Davis Instruments Vantage Pro2 setup. The site offers current temperature, humidity, wind, rainfall totals, 5-day forecasts, radar links, and a local weather exchange network with neighboring stations.
http://gars.club/
The Gainesville Amateur Radio Society (GARS) is a club based in Gainesville, Florida, offering meeting schedules, repeater information, FCC license testing details, and resources for local ham radio enthusiasts. The site covers everything from Morse code history and VOIP for amateurs to club bylaws, awards, and a photo gallery of past activities.