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://starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html
StarChild is NASA's Goddard Space Flight Center educational resource designed to introduce young astronomers ages 5-13 to the solar system, the Milky Way, and the broader universe. Organized into two skill levels, the site covers topics from comets and black holes to galaxies and space terminology, making complex astronomical concepts accessible to children.
https://aty.sdsu.edu/glossary.html
Andrew T. Young's comprehensive glossary defines technical terms used in atmospheric optics, covering phenomena like green flashes, mirages, and refraction drawn from optics, meteorology, astronomy, and geodesy. With 26 major sections and nearly 200 cross-linked entries, it serves as an authoritative reference for anyone studying how light behaves in Earth's atmosphere.
http://ccs.neu.edu/home/amislove/twittermood
Researchers at Northeastern and Harvard University mapped U.S. emotional mood patterns across time and geography using over 300 million tweets from 2006 to 2009. The project features time-lapse video visualizations, density-preserving cartograms, and findings on daily and weekly mood cycles across the country.
http://animalinfo.org/
Animal Info is a comprehensive reference site dedicated to rare, threatened, and endangered mammals around the world, offering detailed species profiles covering biology, ecology, habitat, and conservation status. Visitors can browse by species group, search an alphabetical index of common and scientific names, or explore by country to discover biodiversity and population data for hundreds of at-risk animals.
http://hfpower.com/
ACOM is a manufacturer of HF linear amplifiers and related amateur radio equipment, including the flagship ACOM 2000A automatic amplifier and the ACOM 1000A. The site serves as a product hub for serious ham radio operators seeking high-power amplification solutions built around tubes like the Svetlana 4CX800A.
http://astronomynv.org/
The Astronomical Society of Nevada (ASN) has been promoting astronomy education and public outreach since 1934, making it one of the longer-running amateur astronomy clubs in the region. Visitors can find club membership info, meeting schedules at the Fleischmann Planetarium in Reno, observing resources, photo galleries, and details on events like Messier marathon nights.
https://craq.club/
The Club Radio Amateur de Québec (CRAQ), founded in 1926 and celebrating its 100th anniversary, is one of Quebec's oldest amateur radio clubs, offering membership resources, technical articles, repeater information, QSL cards, and licensing exam preparation. The site includes live HF operation logs, contest schedules, D-STAR networking stats, and a rich archive of club activities and events.
https://naqcc.info/
The North American QRP CW Club (NAQCC) is a free-to-join nonprofit organization dedicated to promoting low-power amateur radio operation using Morse Code and simple wire antennas. Members can participate in contests, sprints, challenges, and CW nets, with resources to help hams of all skill levels improve their CW speed and proficiency.
http://thehellhole.com/
A detailed German-language educational site covering black holes and singularities, exploring topics from stellar and supermassive black holes to Hawking radiation, mathematical models, and even the theoretical dangers of black holes at CERN. The site draws a fascinating parallel between modern astrophysics and Norse mythology's concept of the Maelstrom, making complex science accessible through storytelling.
https://qsl.net/scra
Stony Creek Amateur Radio (NC4FM) is a tax-exempt ham radio club based in Rocky Mount, North Carolina, founded in 2000 to mentor new operators, provide emergency communications, and participate in ARRL contests. The site covers repeater information, Field Day events, license testing, and local amateur radio organizations across the region.