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/cpra
The official web presence of the C.P.R.A. (Confraternidad Puerto Rico Amateur), a Puerto Rican amateur radio organization led by President Miguel Lopez (WP4HDH), offering news, member resources, and links to FCC and ARRL. The site includes proclamations for Amateur Radio Day, net schedules, membership applications, and licensing exam information for Puerto Rico.
https://n5yk.tripod.com/
Randy Ashley (callsign N5YK) shares his personal homepage centered on amateur ham radio, with interests in contesting, 6 meter band, DXing, and RTTY operating from McAllen, Texas. The site also touches on his secondary hobbies of scuba diving and Dutch oven cooking, with links to local Rio Grande Valley ham radio clubs and related resources.
http://nags.net/
NAGS (Norske Amatørgeologers Sammenslutning) is the Norwegian association for amateur geologists, offering a comprehensive lexicon of Norwegian minerals, an index of articles from their geology magazine STEIN dating back to 1973, and listings of geology clubs across Norway. Visitors interested in rocks and minerals as a hobby will find this a rich hub for Norwegian earth science resources and community.
https://owlsp.com/
Wesley Luginbyhl's storm chasing archive spans over two decades of tornado outbreaks, supercells, and severe weather events across Texas, Oklahoma, Kansas, and beyond. Packed with chase accounts organized by date and location, plus landscape photography, aurora shots, and live chase cam resources, this site is a compelling record of life on the storm-chasing circuit.
https://wb1gof.org/
PART of Westford (WB1GOF) is the Police Amateur Radio Team of Westford, Massachusetts, an ARRL Special Service Club with over 45 years of history serving Eastern Massachusetts ham radio enthusiasts. The site covers club activities including fox hunting, D-Star repeaters, emergency communications, kit-building sessions, and a newsletter archive called Particles stretching back to 2000.
http://parallaxinstruments.com/
Parallax Instruments, Inc. is a small business founded in 1991 that manufactures precision astronomical telescopes, German equatorial mounts, rotating tube rings, aluminum tubing, and observatory piers. Their product lineup includes large-aperture Newtonians, Dall-Kirkham Cassegrains, and custom-built instruments crafted in a fully equipped machine shop for serious amateur and professional astronomers.
https://cut-the-knot.org/
Created by Alexander Bogomolny starting in 1996, Cut the Knot is a massive encyclopedic collection of interactive mathematics covering geometry, algebra, probability, puzzles, proofs, and much more, built over decades until his passing in 2018. With thousands of pages, interactive Java applets, Olympiad problems, and articles spanning all levels of math, it stands as one of the most beloved and comprehensive math resources ever built on the early web.
http://damianpeach.com/index.htm
Damian Peach's 'Views of the Cosmos' is a showcase of his acclaimed amateur and professional astrophotography, featuring stunning images of planets, nebulae, and other celestial objects. Peach is widely regarded as one of the world's finest planetary imagers, making this site a must-visit for anyone passionate about deep sky and solar system photography.
https://astronomy-links.com/
Clark M. Thomas of Roanoke, VA has assembled a free, non-commercial collection of astronomy links organized to help stargazers at all experience levels discover resources, from deep sky databases and space telescope galleries to star party listings and homework help. Highlights include curated 'Best of the Best' picks, a newest-links section for returning visitors, and a broad sweep of resources covering Mars missions, the Messier catalog, observing clubs, and more.
https://qsl.net/5b4es
The English School Radio Club (callsign 5B4ES) is a school-based amateur radio club founded in 1969 in Cyprus, covering contesting, licensing exams, and hands-on operator training for new members. The site offers history, exam notes, channel statistics, a photo library, and news about club events, making it a genuine hub for young ham radio enthusiasts.