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/w5gfc
The W5GFC Greers Ferry Amateur Radio Club serves ham radio enthusiasts in the Ozark foothills of Arkansas, offering club news, repeater listings, VE exam info, QSL cards, and a photo album. Founded in the 1970s, this active club also coordinates emergency communications and hosts a weekly net on 147.330+.
https://wm7d.net/
Mark Downing (WM7D) runs this ham radio hub featuring a searchable callsign database, real-time solar flux reports, and dedicated resource pages for Yaesu radios including the FT2000, FT920, and FT100. Visitors will also find DX cluster links, QSO maps, TR Log for Linux, and a curated collection of amateur radio links.
https://keeneastronomy.org/
The Keene Amateur Astronomers (KAA) is a New Hampshire astronomy club established in 1957, offering members access to an observatory, star parties, observing events, telescope training, and a member photo gallery featuring stunning shots of comets, auroras, and the Milky Way. The club also highlights community achievements like member Susan Rolke's selection for NASA and ACEAP ambassador programs, making it a rich hub for both beginner and experienced stargazers in the Cheshire County region.
http://celestialwonders.com/
Frank Barrett's Celestial Wonders showcases an extensive collection of astrophotography spanning nebulae, galaxies, star clusters, solar system objects, and H-alpha imagery. With galleries organized by subject, a slideshow feature, and even an online store, this is a richly detailed labor of love for deep-sky and planetary imaging enthusiasts.
https://do1mj.de/
Marc, callsign DO1MJ, documents his amateur radio journey after earning his license in January 2022, with a strong focus on SOTA (Summits on the Air) activations across Germany, Slovenia, and beyond. Posts cover field equipment, Yaesu radio tips, mountain hikes combined with radio activations, and practical techniques for lightweight portable operating.
https://www.qsl.net/n1bwt/contents.htm
Paul Wade W1GHZ has published his comprehensive Microwave Antenna Book online, covering everything from parabolic dish antennas and horn feeds to electromagnetic field analysis and antenna range measurements. A deep technical reference spanning 13 chapters with downloadable software tools, this is an essential resource for amateur radio operators working in the microwave frequency bands.
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.
http://mreclipse.com/MrEclipse.html
Fred Espenak, known online as MrEclipse, has built one of the most comprehensive eclipse resources on the web, covering solar and lunar eclipses with decades of photographs spanning from 1970 to the present. Visitors will find beginner guides, safety tips, photography tutorials, eclipse preview calendars, and an extensive archive of stunning eclipse imagery from expeditions around the world.
https://erau.ee/et
The Estonian Amateur Radio Union (ERAÜ) is the official national organization for ham radio operators in Estonia, a member of IARU since 1938. The site offers extensive resources including contest calendars, repeater and beacon info, exam guidance, QSL services, SDR links, and club directories, all available in Estonian and English.
https://kennethfalconer.github.io/
Kenneth Falconer is a Regius Professor of Mathematics at the University of St Andrews whose personal academic page covers his pioneering work in fractal geometry, geometric measure theory, and multifractal analysis. Visitors will find links to his books and preprints, fractal movie resources, maths poems, and even a note about his impressive record completing 36 LDWA hundred-mile walks.