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://theastropages.com/glossary/index.htm
The @stro Pages is a comprehensive amateur astronomy resource featuring a full A-Z glossary of astronomical terms, astrophotos, articles, and an observer's log focused on the San Diego area. With sections covering telescope making, deep-sky objects, and a local astronomy calendar, it serves as a rich hub for stargazers of all experience levels.
https://arandomsite.neocities.org/
Ariu is a high school junior from Indiana whose personal site documents a remarkable range of pursuits, from Drosophila genetics research and healthcare legislation advocacy to an AI tool for school nurses. The site serves as a living digital portfolio of someone genuinely engaged in science, medicine, and civic life at a young age.
https://ure.es/
The Unión de Radioaficionados Españoles (URE) is Spain's national amateur radio association and the Spanish section of the IARU, serving as the official body representing ham radio operators across the country. The site offers licensing information, exam guidance, contest calendars, QSL traffic resources, a webcluster, a members-only area, and a regularly published magazine called Radioaficionados.
https://chinalakeastro.org/
The China Lake Astronomical Society (CLAS) is a community astronomy club based in Ridgecrest, California, taking advantage of some of the darkest skies in the United States near Death Valley. The site offers information on monthly meetings, star parties at their dark sky site on Brown Road, newsletters, and membership for skywatchers in the Indian Wells Valley.
https://www.qsl.net/k6ls/test.html
Phil (K6LS) has assembled an extensive directory of links to test and measurement equipment manufacturers, dealers, and related resources for amateur radio and electronics hobbyists. The collection spans commercial makers like Tektronix, Fluke, and Rohde & Schwarz alongside used equipment dealers, repair services, and homebrew resources, making it a useful reference for anyone sourcing or servicing RF test gear.
http://sguisard.astrosurf.com/
Stéphane Guisard's personal astrophotography showcase, 'Los Cielos de América,' features stunning celestial imagery captured from the Americas and beyond. The image-heavy site is a visual feast for astronomy enthusiasts, presenting the night skies through the lens of a dedicated and skilled astrophotographer.
https://hfsignals.com/
HF Signals is the official home of the BITX line of amateur radio transceivers, offering a range of affordable QRP kits from the $39 all-analog LARCSet to the feature-packed $399 sBitx v3 SDR. Each radio is hand-assembled and tested, with open-source schematics and software, making them popular among homebrewers, beginners, and QRP enthusiasts worldwide.
https://abuseofnotation.github.io/
Abuse of Notation is a thoughtful blog by a writer who weaves together mathematics, logic, philosophy, and programming into long-form essays and books, covering topics from category theory to Kant to functional programming. The site also features several self-authored books, including 'Category Theory Illustrated,' making it a surprisingly deep resource for readers who enjoy rigorous yet personal intellectual exploration.
https://milwaukeeastro.org/
The Milwaukee Astronomical Society has maintained this richly detailed site for its membership, featuring multiple observatories, a deep archive of astrophotography spanning decades, and extensive beginner resources covering telescopes, stargazing tours, and celestial objects. With a historic club archive dating back to 1932, seasonal sky guides, variable star projects, and a member image showcase, this is a treasured hub for amateur astronomers in Wisconsin.
https://harc.net/
The Huntsville Amateur Radio Club (HARC) is a 501(c)(3) nonprofit based in Huntsville, Alabama, dedicated to educating and training members in amateur radio with a focus on emergency communications support. The site offers access to club resources including a newsletter, repeater and net information, a classifieds section, SKYWARN and ARES/RACES emergency programs, and a DX club.