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/k6ls/test.html
Phil (K6LS) has assembled an extensive directory of links to test and measurement equipment manufacturers, dealers, and related resources for amateur radio and electronics hobbyists. The collection spans commercial makers like Tektronix, Fluke, and Rohde & Schwarz alongside used equipment dealers, repair services, and homebrew resources, making it a useful reference for anyone sourcing or servicing RF test gear.
https://observing.skyhound.com/
Observing at Skyhound is a long-running amateur astronomy resource from the creator of SkyTools 3, offering deep sky observing guides, comet chasing updates, monthly observing information, and a growing handbook of articles. Dating back to 1999, the site blends personal observing experience with practical tools and links for serious amateur astronomers.
https://qth.com/sos
The Sultans of Shwing is the group page for ham radio operators Mike K9NW, Chad WE9V, and Scott KA9FOX, centered around their legendary annual parties at the Dayton Hamvention stretching back to 1995. The site features years of party photos, links to contesting and DX resources, and the irreverent humor of the ham radio contest community.
https://sandra.radio/
SANDRA (San Diego Repeater Association) is a 501(c)(4) non-profit amateur radio club based in San Diego, California, serving local ham radio operators with repeater listings, digital services, and club resources. The site offers member information, net schedules, a mailing list, meeting recordings, and operating guidelines for the regional amateur radio community.
https://www.qsl.net/kg4dwj
The Florida Trackers Society is an amateur radio club based in Florida dedicated to ARDF (Amateur Radio Direction Finding), foxhunting competitions, and Skywarn storm tracking in coordination with the National Weather Service. Founded in 1999 under the callsign KG4DWJ, the site covers club membership, foxhunt rules, Doppler weather tracking vehicles, and upcoming events for ham radio enthusiasts across the state.
http://astronomie.be/registax
RegiStax and waveSharp are free image processing tools developed by Cor Berrevoets and an international team, designed specifically for stacking and sharpening astronomical images from AVI video files. The site hosts downloads, release notes, and articles from contributors covering lunar, solar, and planetary imaging techniques under Linux and Windows.
https://dcara.net/
The Denton County Amateur Radio Association (DCARA) is the official club site for ham radio operators in Denton County, Texas, operating under club call sign W5NGU. Visitors can find information about club meetings, repeater status, license classes, public service events, Field Day activities, and membership details for the North Texas amateur radio community.
https://qsl.net/k1ncr
The North Country Amateur Radio Club (K1NCR) serves ham radio operators in northern New Hampshire and Vermont, with meeting announcements, member callsigns, and coverage of their annual Field Day operations. The site features Real Video footage of members operating 40-meter phone and CW, links to regional repeater clubs, and introductory info for those curious about getting their ham license.
https://stormgasm.com/
Stormgasm is the storm chasing hub of Jim Bishop, Juston Drake, and Simon Brewer, featuring tornado videos, hurricane footage, supercell photography, and storm chase journals from across the Great Plains and beyond. Visitors can browse a stock footage library, explore photo galleries, and follow the team's active storm chasing adventures in real time.
http://citynight.com/atv
The personal amateur radio station page of WA6ZJG, operated from Alameda, California in the San Francisco Bay Area, with a focus on Amateur Television (ATV) operations. Visitors can find station information, ATV repeater live video captures from W6CX, announcements, and ham-related links.