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)
http://www.berksastronomy.org/
The Berks County Amateur Astronomical Society (BCAAS) is a Pennsylvania-based astronomy club hosting monthly meetings, star parties, and online AstroHangouts via Zoom for space enthusiasts. The site features clear sky clocks for local observing sites including Pulpit Rock Astronomical Park and Carpenter Observatory, plus a club newsletter called Pegasus.
http://rcra.wagnera.com/
The Red Cedar Repeater Association (RCRA) is a Wisconsin-based amateur radio club established in 1974, serving as trustee for the K9KGB repeater system covering West Central Wisconsin along the I-94 corridor. The site provides technical details on their 2-meter repeater frequencies, PL tones, and remote links, along with embedded National Weather Service radar tools useful for local operators.
http://g3pho.free-online.co.uk/microwaves
A hobbyist site dedicated to microwave frequencies above 1000MHz, inviting visitors to explore the upper reaches of the amateur radio spectrum. The site is part of the Amateur Radio World Ring webring, connecting enthusiasts focused on microwave and UHF/SHF band experimentation.
http://monitoringtimes.com/html/mtswlprimer1.html
A beginner's guide to shortwave radio listening from Monitoring Times, written by Ken Reitz, covering how to choose the right receiver across price ranges from budget portables to professional communications receivers. The article walks newcomers through buying new versus used equipment, notable brands like Sony, Sangean, and Grundig, and even vintage shortwave sets worth hunting down at ham fests.
http://ham-radio.com/wa6cgr
Dave Glawson (WA6CGR) shares his extensive microwave radio projects, including transverters, amplifiers, and PLL systems published in Microwave Update and West Coast VHF/Microwave Conference proceedings. A valuable technical reference for hams interested in microwave experimentation, featuring contest reports from the ARRL 10 GHz and Up Contest and downloadable PDF articles.
https://deepimpact.astro.umd.edu/
The official University of Maryland archive for NASA's Deep Impact mission, which sent a spacecraft to collide with comet Tempel 1 in 2005 and later extended its mission as EPOXI to observe comet Hartley 2 and distant exoplanets. The site preserves science results, image and video galleries, team member profiles, and mission history through the spacecraft's final loss of contact in 2013.
http://citynight.com/camera
Robert W. Swan's pioneering live telerobotic internet camera, mounted atop an antenna tower at Amateur Radio Station WA6ZJG in Alameda, California, has been running continuously since June 1995. Visitors can remotely aim the camera left or right and watch live street-level views of the San Francisco Bay Area, making it one of the earliest publicly controllable webcams on the internet.
http://w0abr.com/
The Hub City Amateur Radio Club (W0ABR) serves the Aberdeen, South Dakota area with regular club meetings, nets, and informal coffee gatherings for ham radio enthusiasts. The site lists upcoming events, links to local APRS activity and weather resources, and connects members to the ARRL and regional repeater networks.
http://n3sh.org/
The Wireless Association of South Hills (WASH) is an amateur radio club based in the South Hills area, offering a rich calendar of activities including Field Day, PA QSO Party, VHF/UHF repeater nets, ARRL licensing exams, and ARES/RACES emergency communications support. The site serves as a hub for both seasoned hams and newcomers curious about getting licensed, with how-to guides, a club newsletter called the WASHRag, and information on public service events like Skywarn spotting.
https://repeater-builder.com/
Repeater Builder is a dedicated resource for amateur radio enthusiasts focused on building, modifying, and maintaining repeater systems. The site dives into the technical side of ham radio infrastructure, making it a go-to reference for hobbyists who want to construct or upgrade their own repeaters.