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/vu2msy/LINKS.htm
Compiled by Sandeep Baruah (VU2MSY/VU2MUE), this page catalogs over 200 ham radio links spanning Indian amateur radio clubs, international organizations like IARU and ARRL, digital communication software, antenna resources, and QRP homebrewing sites. It offers a particularly strong focus on the Indian amateur radio community, including regional clubs in Bangalore, New Delhi, and Gujarat, making it a useful snapshot of the early-2000s ham radio web.
https://delmarvastargazers.org/
The Delmarva Stargazer Society was an amateur astronomy club founded in 1993 on the Delmarva Peninsula that ran star parties at three dedicated dark sky sites until disbanding in 2019. This archived site preserves the club's history, newsletters, by-laws, and meeting minutes, and is maintained by member Michael Lecuyer who still brings telescopes out for public viewing in Wyoming, Delaware.
https://oasi.org.uk/
The Orwell Astronomical Society Ipswich (OASI) is a UK-based astronomy club centered at the historic Orwell Park Observatory in Suffolk, welcoming everyone from casual stargazers to dedicated amateurs with specialist observing and telescope-building skills. The site features upcoming lecture events and Zoom talks, member observing reports, a newsletter archive, comet guides, and a rotating gallery of impressive astrophotography captured by members.
http://damtp.cam.ac.uk/user/tong/teaching.html
David Tong, a professor at Cambridge University, offers a comprehensive collection of free lecture notes covering nearly every area of theoretical physics, from classical mechanics and electromagnetism to quantum field theory and string theory. The notes are aimed at undergraduates and graduate students and represent a genuinely deep academic resource, with dozens of individual courses each spanning multiple topics.
http://www2.rdrop.com/users/billmc
Bill McFadden's eclectic homepage covers a surprisingly deep range of radio-related interests, from pirate radio station KHOG and FCC licensing FAQs to scanner frequencies, shortwave charts, and wireless microphone regulations. Alongside the radio content, visitors will find loudspeaker design resources, audio editing scripts for Cool Edit Pro, and home automation links, making it a genuine hobbyist's workbench online.
https://sandra.radio/
SANDRA (San Diego Repeater Association) is a 501(c)(4) non-profit amateur radio club based in San Diego, California, serving local ham radio operators with repeater listings, digital services, and club resources. The site offers member information, net schedules, a mailing list, meeting recordings, and operating guidelines for the regional amateur radio community.
http://rainreport.com/
RainReport.com offers a way to track and measure rainfall data without needing on-site monitoring equipment or physically visiting your property. The service uses Doppler radar and related data to provide precise rainfall reports, making it a practical tool for homeowners, farmers, and anyone who needs to know when and how much rain fell at a specific location.
https://frankdeboosere.be/klimaatukkel/klimaatjuni.php
Belgian meteorologist Frank Deboosere presents detailed interactive climate charts for Uccle, Belgium, tracking temperature, precipitation, and sunshine duration across decades. The graphs plot 30-year rolling averages against current normals, making long-term climate trends and changes visually accessible to anyone curious about local Belgian climate history.
https://eclipse-chasers.com/
Eclipse Chasers is a dedicated hub for anyone passionate about witnessing total solar eclipses, offering photography tips, safety guides, solar eclipse maps, and an interactive worldwide log where visitors can record and share their own eclipse observations. The site combines practical tools like online calculators with educational content and links to authoritative references, making it a solid starting point for both newcomers and seasoned eclipse travelers.
https://www.qsl.net/w5www/ron.html
Ron (W5WWW) maintains this hub page collecting all the amateur radio webrings he belongs to, including the Radio Amateur Ring, Amateur Radio World Ring, HAMs on The Net, and Ham Radio Chat rings. A useful snapshot of how the early ham radio online community organized itself through interconnected webring networks.