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://chicagofmclub.org/
The Chicago FM Club (CFMC) is a Chicagoland amateur radio club established in 1965 with over 150 members, operating five repeaters and hosting nightly nets, monthly fox hunts, and the annual Radio Expo ham fest. The site covers club membership, FCC exam testing, public service events, and social gatherings for hams in the greater Chicago area.
http://cometography.com/
Cometography.com is a scholarly reference site originally built by Gary W. Kronk, companion to his six-volume Cambridge University Press book series, offering in-depth historical data on periodic and notable comets throughout history. Now maintained by José J. Chambó, the site preserves and expands Kronk's decades of comet research for astronomers and enthusiasts alike.
https://cedar-astronomers.org/
Cedar Amateur Astronomers (CAA) is an astronomy club based in the Cedar Rapids, Iowa area, hosting regular public programs, monthly business meetings, and stargazing events at their Pal-Dows Observatory. The site provides event schedules, Zoom recording links for past programs, a clear sky chart, and resources through affiliations with the Astronomical League and the Night Sky Network.
https://afvl.li/
The Amateurfunk Verein Liechtenstein (AFVL) is the official amateur radio club of Liechtenstein, founded in 1986 and serving operators in the HBØ callsign region. The site covers club activities, DMR and FM repeaters, WinLink access, emergency communications, AREDN mesh networking, and upcoming events like POTA outings and monthly meetups.
https://gutenberg.org/cache/epub/11587/pg11587-images.html
A digitized 1922 educational text by Charles Lathrop Pack, President of the American Tree Association, covering all aspects of forestry from how trees grow to national forest policy and the dangers of fire and disease. Hosted on Project Gutenberg, this freely available ebook spans 18 chapters and includes period photographs of forests, rangers, and fire damage, making it a fascinating historical resource on early American conservation thought.
http://planetquest.org/
PlanetQuest is a nonprofit citizen science project inviting the public to participate in real exoplanet detection research using distributed computing and a shared software platform called the Collaboratory. Visitors can download tools to search stellar light curves for transiting planets, contributing spare CPU cycles to a project affiliated with NASA's Kepler Mission.
https://1x1callsigns.org/
A dedicated resource for amateur radio operators looking to reserve FCC-authorized one-by-one (1x1) special event call signs for conventions, festivals, and other community celebrations. The site includes an FCC regulations guide, a searchable 1x1 callsign database, coordinator listings, and a reservation request system for temporary station operation.
![en:start [Virtual Moon Atlas Version 9.0]](/screenshots/39586.webp)
http://ap-i.net/avl/en/start
Virtual Moon Atlas (VMA) is a free, feature-rich lunar observation and study program for Windows and Linux, now in its ninth major version after over two decades of development. Downloaded nearly 2 million times worldwide, it has been used by the European Space Agency, CNRS research professors, and even to help prepare the Chandrayaan 1 lunar mission.
https://sidewalkastronomers.us/
The Sidewalk Astronomers are a public service amateur astronomy association founded in the tradition of John Dobson, dedicated to bringing telescopes directly to the public in parks, street corners, and busy public spaces. The site features event schedules, telescope plans, newsletters, international projects, and resources for local chapters around the world.
https://sprott.physics.wisc.edu/pickover/home.htm
The personal homepage of prolific author and inventor Clifford A. Pickover, featuring links to his 50+ books spanning fractals, chaos, black holes, the fourth dimension, and the mathematics of reality. With 800 patents, a sprawling collection of puzzles, art, and cosmic questions, this site is a portal into the mind of one of science's most imaginative popularizers.