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://homingin.com/
Maintained by Joe Moell (K0OV) since 1988, Homing In is a comprehensive resource dedicated to radio direction finding, foxhunting, and amateur radio direction finding (ARDF) competitions worldwide. Visitors will find news about international championships, technical projects, equipment guides, event results, wildlife tracking applications, and a wealth of articles spanning decades of expertise in the hobby.
http://australiasevereweather.com/
Maintained by storm chasers Michael Bath and Jimmy Deguara, Australia Severe Weather is a comprehensive archive of severe weather photography, storm chasing reports, tornado and waterspout pictures, and tropical cyclone tracking maps covering Australian weather events. With over 35,000 photographs, timelapse webcam videos, flood history records, and storm chasing news, it serves as a serious reference for anyone fascinated by extreme Australian weather.
https://thecosmarnaut.neocities.org/
Mars, a 20-something university student, built this space-themed personal site called The Observatory as both a creative outlet and a first coding project. The site features personal pages covering favorites, original characters, and infodumps, all wrapped in a stargazing aesthetic with pixel art and a love of space at its heart.
https://w7yrc.org/
The Yavapai Amateur Radio Club (W7YRC) serves ham radio enthusiasts in the Prescott, Arizona area with license classes, repeater information, club events, and public service opportunities. The site offers a wealth of resources including study materials for license exams, a monthly newsletter called the YARC Signal, and details on events like Field Day and the Prescott Hamfest.
https://qsl.net/scra
Stony Creek Amateur Radio (NC4FM) is a tax-exempt ham radio club based in Rocky Mount, North Carolina, founded in 2000 to mentor new operators, provide emergency communications, and participate in ARRL contests. The site covers repeater information, Field Day events, license testing, and local amateur radio organizations across the region.
https://pgadey.ca/
Parker Adey is a math lecturer at the University of Toronto Scarborough who shares formal notes, informal blog posts, reading recommendations, and teaching materials spanning topology, linear algebra, and beyond. The site doubles as an academic hub with a CV, publications list, office webcam, and a decade of evolution captured in the Wayback Machine.
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.
https://smas.us/
The Southern Maryland Astronomical Society (SMAS) is an amateur astronomy club that meets twice monthly at the Nanjemoy Creek Observatory in southern Maryland, home to a Celestron CGE 1400 Schmidt-Cassegrain 14-inch telescope. Members range from beginners to seasoned observers with decades of experience, and the club welcomes donations and new members to support its nonprofit mission.
http://ned.ipac.caltech.edu/help/cosmology_calc.html
Hosted by NASA's Extragalactic Database (NED) at Caltech, this curated page collects links to online cosmology calculators contributed by researchers at UCLA, University of Colorado, and other institutions. Visitors can compute distances, lookback times, Hubble parameters, K-corrections, and other key cosmological quantities by entering values like redshift, Hubble constant, and Omega parameters.
https://bara.org/
The Bergen Amateur Radio Association (BARA) is a New Jersey-based ham radio club serving Bergen County, with monthly meetings, weekly nets, VE exams, and semi-annual hamfests. Members range from antenna specialists to digital mode enthusiasts, and the club has a strong tradition of technical knowledge sharing and community participation.