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/ctsara
Hosted on QSL.net, this site belongs to CTSARA, likely a Connecticut-area amateur radio association with club resources and member information. The file listing suggests HTML pages with club details and downloadable files, typical of a regional ham radio group's web presence.
http://brastro.org/
The Baton Rouge Astronomical Society (BRAS) is a Louisiana-based astronomy club founded in 1981, bringing together roughly 95 amateur and experienced stargazers in the greater Baton Rouge area. Visitors can browse monthly observing guides, member astrophotos, a newsletter archive, dark sky advocacy efforts, and information on joining or attending events at the Highland Road Park Observatory.
https://observers.org/
The SF Bay Area Astronomy Connection (TAC) is an informal network for amateur astronomers across the greater San Francisco Bay Area, connecting observers without the formality of dues, officers, or bylaws. The site features an extensive list of observing sites throughout the region, curated observing lists, equipment guides, and resources for both beginners and seasoned stargazers.
https://cdxa.org/
The Carolina DX Association (CDXA) is a ham radio club based in the Carolinas, dedicated to DX hunting and contesting under callsign W4DXA. The virtual club room offers members antenna calculators, packet cluster links, photo albums, contest resources, roster management, and event payment tools for club luncheons.
http://k0ham.com/
K0HAM is an amateur radio operator's personal site, identifiable by the callsign-based domain that follows standard ham radio naming conventions. The site uses a frames-based layout typical of early web design, suggesting a hobbyist page dedicated to ham radio activity and resources.
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.
http://virtualcolony.com/sac
The Deep Sky Database is an online observing list generator for amateur astronomers, drawing on the Saguaro Astronomy Club's meticulously maintained databases to help users search for galaxies, nebulae, star clusters, double stars, asterisms, and more. Built on decades of collaborative contributions from club members, it offers searchable access to well-known catalogs including Messier, Caldwell, Herschel 400, and Herschel 2500 objects, making it a practical planning tool for backyard stargazers.
http://capitalastronomers.org/
The National Capital Astronomers is a Washington D.C. metro area nonprofit astronomy club founded in 1937 at the US Naval Observatory, offering monthly star talks, public telescope events at Rock Creek National Park, and science fair outreach programs. Members and visitors can find meeting lecture videos, telescope-making workshop info, stargazing tips, and membership details for this long-running amateur astronomy society.
https://whatcomastronomy.org/
The Whatcom Association of Celestial Observers (W.A.C.O.) is a community astronomy club founded in 1988 in Bellingham, Washington, dedicated to making amateur astronomy accessible and enjoyable. The site offers a calendar of meetings, member resources, observing programs, photos, and local astronomy links for the Pacific Northwest region.
https://dk7ih.de/2022/05/new-post-a-walkie-talkie-ssb-transceiver-for-14mhz-or-the-higher-rf-bands
DK7IH is the personal engineering site of Peter Rachow, a radio amateur who documents his homebrew SSB transceiver builds including QRP multiband rigs, walkie-talkie style transceivers, and SMD-based designs for the 14MHz band and beyond. The site is a detailed technical resource for ham radio enthusiasts interested in hands-on RF circuit construction and design.