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/cwra
The Central Wisconsin Repeater Association (CWRA) is a ham radio club based in the Madison/Baraboo area that owns and operates two 2-meter FM repeaters serving southern Wisconsin. Founded over 35 years ago, the site offers membership information, newsletters, board of directors details, and resources like FCC license renewal links, with a notable emphasis on public safety and storm watch coordination.
https://asteroidoccultation.com/
Steve Preston's long-running resource provides predictions for asteroid occultation events, listing when asteroids will pass in front of stars as seen from Earth. Covering upcoming events through 2026 with supplementary observation guides and FAQs, it serves as a reference for amateur and professional astronomers tracking these brief but scientifically valuable phenomena.
http://ssastros.org/testsite
The South Shore Astronomical Society is a community astronomy club bringing together stargazers and space enthusiasts in the South Shore region. This appears to be the club's official web presence, serving as a hub for members and those interested in joining a local astronomical society.
https://flemingastrophotography.com/
Neil Fleming's astrophotography showcase specializes in deep-sky imaging using the Meade DSI CCD camera, capturing galaxies, nebulae, and star clusters. The site highlights work done with high-end equipment including an NP-127 refractor and NJP mount, making it a compelling destination for amateur astronomers interested in CCD imaging techniques.
https://dvaa.org/
The Delaware Valley Amateur Astronomers (DVAA) is a club serving astronomy enthusiasts in the Philadelphia region, offering star parties, loaner equipment, observing site guides, and an expert Q&A forum for beginners and seasoned stargazers alike. The site features astrophotography resources, member image galleries, outreach event coverage, and a newsletter, making it a rich hub for amateur astronomy in the area.
https://members.tripod.com/~Hamnut_2/index.htm
Larry Miller (KB5ITT) shares his adventures installing ham radio repeaters on mountain peaks in the San Juan Mountains of southwestern Colorado, blending technical radio work with exploration of ghost towns and scenic four-wheeling routes. The site covers two specific mountain-top repeater builds near Silverton, historical photography of old mining towns like Animas Forks, and off-road trail information for the region.
https://www.qsl.net/kc4gzx/index.htm
KC4GZX is a ham radio operator's personal page hosted on QSL.NET, featuring links to related amateur radio homebrew projects and callsign pages. The site serves as a small hub connecting several ham radio enthusiasts and their stations, with a focus on homebrew radio projects.
https://aprs.org/
The original home of APRS (Automatic Packet Reporting System), a ham radio digital communications protocol developed by Bob Bruninga (WB4APR) that allows operators to share real-time position, weather, messages, and event data over a single national channel. Now maintained for historical purposes, the site archives over two decades of APRS development including presentations, technical guides, satellite projects, and links to balloon launches and digipeater resources.
https://www.qsl.net/ac6xi
AC6XI's personal amateur radio homepage, featuring a link to a how-to page and contact information for this licensed ham operator. The site is sparse but serves as a basic online presence for the callsign AC6XI, with promises of future updates.
https://k3can.us/
K3CAN's homepage belongs to a licensed amateur radio operator, identified by the FCC-style callsign K3CAN. The site appears to be a classic old-web personal page with ASCII art and a frames-based layout, offering a glimpse into the hobbyist ham radio community of the early internet era.