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)
http://ham-radio.com/sbms
The San Bernardino Microwave Society (SBMS) is a non-profit technical club dedicated to amateur radio communications above 1 GHz, serving the Southern California region with monthly meetings, contests, and a rich archive of technical papers. Visitors can find member project presentations, contest results for 10 GHz and 2.3 GHz ARRL events, software tools, and newsletters covering cutting-edge microwave experimentation.
https://chemguide.co.uk/index.html
Chemguide, created by Jim Clark, is a comprehensive chemistry reference site aimed at helping students aged 14 through A-level understand topics ranging from atomic structure and bonding to organic reaction mechanisms and physical chemistry. Covering major UK exam syllabuses including GCSE, CIE Cambridge International, and Edexcel, it serves as an authoritative free study aid with deep topic coverage across all major chemistry disciplines.
https://castfvg.it/galassie/indexgal.htm
An extensive galaxy catalog reference compiled by the Circolo Astrofili Talmassons (C.AS.T.), an Italian astronomy club, featuring member-photographed images organized across major catalogs including NGC, UGC, IC, PGC, Messier, and VCC. The site covers thousands of galaxies alongside deep sky objects, quasars, and galaxy clusters, making it a remarkable visual archive built collaboratively since 1996.
http://c14isawesome.blogspot.com/
Stephen Saber, an amateur astronomer, shares deep-sky observing lists, lunar phenomena like Saber's Beads, and stargazing tips on this enthusiast blog. Catalogued targets from the Messier, Caldwell, RASC, and Herschel 400 lists make it a practical resource for marathon observers hunting NGC objects.
http://rocketroberts.com/astro/astrophot.htm
Joe Roberts shares a remarkable personal archive of amateur astrophotography spanning from 1974 to 2013, featuring backyard telescope images of deep-sky objects, planets, comets, and lunar phenomena. The site includes technical articles, a tour of his personal observatory, and a gallery of stunning images that rival professional observatory photography from decades past.
http://mineralzine.chez.com/
Mineral Webzine is a bilingual French-English non-commercial online magazine dedicated to rockhounds, mineral collectors, and geology enthusiasts. Featuring photographs of specimens like garnet, wulfenite, and cinnabar contributed by collectors from Canada and France, it serves as a reference for mineralogy, crystallography, and gemology.
https://astronomy.ie/AIRS
Astronomy Ireland Radio Show (AIRS) is the podcast and live broadcast archive for Ireland's dedicated astronomy radio program, transmitted every Tuesday on 103.2 Dublin City FM. Visitors can stream or download episodes featuring guests like Sir Patrick Moore, with archives spanning back through 2017 and a team including presenter Ben Emmett and sky notes by David Moore.
https://lynkeos.sourceforge.io/
Lynkeos is a SourceForge-hosted software project dedicated to processing planetary images captured with webcams, aimed at amateur astronomers looking to enhance their astrophotography. The tool focuses on stacking and refining low-quality frames to produce sharper planetary images, making it a niche but valuable resource for hobbyist planetary imagers.
https://tigertronics.com/
Tigertronics is the home of the SignaLink and BayPac series of sound card radio interfaces, offering products and resources for amateur radio digital mode operation. The site serves ham radio operators looking to connect their radios to computers for modes like packet, PSK31, and other digital communications.
https://astronomynotes.com/
Nick Strobel's Astronomy Notes is a comprehensive, free educational resource covering introductory astronomy topics from the scientific method and history of astronomy to planetary science, relativity, and telescopes. Originally created for college-level astronomy courses, the site has been widely copied across the web and is also available as a purchasable hardcopy book through Kendall Hunt.