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/na4sh
The Nash County ARES (Amateur Radio Emergency Service) is a volunteer group serving Nash County and Rocky Mount, North Carolina by providing emergency communications during disasters like hurricanes, floods, and tornadoes. The site covers their weekly nets on local repeaters, links to weather resources, and connections to state and national ARES organizations.
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.
http://weather.actonastro.com/
ActonAstro Weather is a personal weather station site run out of Acton, California, delivering live conditions including temperature, humidity, dew point, wind speed, and barometric pressure. The site offers an impressive depth of historical data with daily, weekly, monthly, and seasonal records, plus links to nearby family stations, radar, air quality, and space weather resources.
http://twiar.org/
This Week in Amateur Radio (TWIAR) is a long-running news service delivering up-to-the-minute ham radio news via amateur repeaters, HF, shortwave, LPFM, and podcasting. Produced by Community Video Associates, Inc., it covers the latest developments in amateur radio technology, DX, satellites, and more, supported by listener donations.
https://www.qsl.net/bharc
Hosted on QSL.net, this site belongs to BHARC, likely a local amateur radio club or ham radio organization based on the domain structure. The page uses frames, suggesting it contains club information, resources, or member content typical of ham radio community sites from the early web era.
http://kellysky.net/
Al Kelly's dedicated astrophotography site showcases stunning CCD images of galaxies, nebulae, star clusters, and solar system objects captured with equipment including a Celestron CGE 1400 telescope and Orion Parsec 8300C camera. Beyond the image galleries, the site offers a CCD instruction manual, a G2V color calibration article, and links to fellow astrophotographers, making it a valuable resource for amateur astronomers interested in CCD imaging.
https://ptable.com/
Ptable is a richly interactive periodic table created by Michael Dayah, offering property trend visualization, 3D orbital diagrams, isotope data, and compound mixing tools for all 118 elements. Available in dozens of languages and regularly updated, it serves as a go-to reference for students, educators, and chemistry enthusiasts alike.
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://karc.net/
KARC.net appears to be the web presence for a Kansas amateur radio club or organization, serving as a hub for local ham radio operators. The site functions as a host server for the club's online activities and community resources.
http://amateurlogic.com/blog
AmateurLogic.TV is a long-running ham radio video show and blog covering radio technology, licensing education through its Ham College series, and hands-on gear topics. With archives stretching back to 2005 and content available on YouTube, Roku, Spotify, and Amazon Prime, it offers an impressive breadth of resources for both new and experienced amateur radio operators.