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://chebucto.ns.ca/~aa063
Mike Boschat's astronomy page celebrates 60 years of stargazing from Halifax, Nova Scotia, covering lunar, solar, meteor, and noctilucent cloud observations with an impressive collection of Soviet-made telescopes and binoculars. The site includes astro images, SOHO discoveries, links to clear sky clocks, light pollution maps, and a vast collection of astronomy resources alongside the author's work with the Aeronet Sunphotometer at Dalhousie University.
https://warc1.org/
The Wichita Amateur Radio Club (WARC) has been serving Kansas ham radio enthusiasts since 1932, making it one of the longer-running amateur radio clubs in the region. The site features news about Field Day operations, repeater information, licensing resources, and club activities including visits from Wichita's mayor during Amateur Radio Week.
https://isws.illinois.edu/statecli/cuweather
Maintained by the Illinois State Water Survey and State Climatologist Dr. Jim Angel, this site provides detailed climate data for Champaign-Urbana going back to 1996, including daily and monthly temperature, precipitation, snowfall, and degree day records. It's a rich archival resource for anyone researching Illinois weather history, with links to real-time conditions, airport hourly data, and regional precipitation networks.
https://amateur-radio.net/rptr
Operated by K1IW, this searchable database lets ham radio operators and enthusiasts look up amateur repeaters and broadcast transmitters across all 50 U.S. states, Washington D.C., and Canadian provinces. Users can filter results by band, digital mode (DMR, D-STAR, YSF), distance from a location, and more, with data sourced from official FCC and NFCC coordination records.
https://las-skycamp.org/
The LAS Equinox Sky Camp is the UK's largest star party, bringing hundreds of amateur astronomers together for a week of dark-sky observing at Kelling Heath Holiday Park on the North Norfolk coast. The site covers event logistics, pitch booking advice, vendor trade stands, talks, and links to associated astronomy societies and suppliers.
http://jap.hu/electronic
Peter's DIY electronics hub showcases a range of original hardware projects including relay modules for Raspberry Pi and Arduino, PIC microcontroller circuits, remote control encoders, and an LCD thermometer. Each project comes with schematics and build guides, making this a great resource for hobbyist engineers looking for practical, hands-on circuit designs.
http://radiowrench.com/sonic/index.html
A long-running free resource archive started in 1997 offering downloadable manuals, service documents, and technical diagrams for VHF/UHF radios, repeaters, antennas, and related RF equipment. The site hosts PDFs covering everything from GE MVP repeater manuals to tone decoder boards and duplexer specs, making it a valuable reference for amateur radio operators and radio technicians.
https://cadcwww.dao.nrc.ca/
The Canadian Astronomy Data Centre (CADC) is an official Government of Canada research facility that archives and provides access to astronomical data for scientists and researchers. Hosted by the National Research Council of Canada, it serves as a centralized repository for observational astronomy data collections.
http://astrochemistry.eu/
Astrochemistry.eu, maintained by Guido W. Fuchs, serves as a collaborative hub for researchers in astrophysics and astrochemistry, covering observational, laboratory, and theoretical investigations of interstellar chemistry. Visitors can find featured news on prize-winning discoveries, upcoming conferences, job opportunities, and curated links to major databases, journals, and research networks worldwide.
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.