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://observers.org/
The SF Bay Area Astronomy Connection (TAC) is an informal network for amateur astronomers across the greater San Francisco Bay Area, connecting observers without the formality of dues, officers, or bylaws. The site features an extensive list of observing sites throughout the region, curated observing lists, equipment guides, and resources for both beginners and seasoned stargazers.
http://xmlog.com/
XMLog is a free amateur radio logbook application for Windows, created by Michael McAmis (W1ECT), offering flexible log searching, awards tracking for DXCC, WAZ, and WAS, LoTW integration, and callbook lookups. The site serves as the official download and support hub for the software, with documentation, beta releases, and a linked community group on groups.io.
https://k5sar.com/
The Shreveport Amateur Radio Association (K5SAR) is an ARRL Special Service Club based in Northwest Louisiana, founded in 1978 and serving over 120 licensed ham radio operators of all ages and experience levels. The site covers club membership, public service events, SKYWARN severe weather communications, hamfests, license exam resources, and local repeater information.
http://echolink.org/
EchoLink is the home of a widely-used software platform that lets licensed amateur radio operators connect with each other worldwide via the internet using streaming audio technology. With over 350,000 validated users across 159 countries and apps available for Windows, Android, iOS, and web browsers, it is a cornerstone tool in the modern ham radio community.
http://jgiesen.de/GeoAstro/GeoAstro.htm
Juergen Giesen's GeoAstro Applet Collection offers more than 65 interactive Java applets for tracking the precise positions of the sun, moon, and planets, including sundials, moon phases, eclipse data, and sky maps for any location on Earth. Featured in Sky & Telescope magazine and honored with the Griffith Observatory Star Award, this site is a remarkable labor of love for amateur and professional astronomers alike.
https://k-state.edu/w0qqq?utm_source=ksuarc&utm_medium=redirect&utm_campaign=pulled-down
The Kansas State University Amateur Radio Club (WØQQQ) has served K-State and the Manhattan, Kansas community for over a century, offering licensing workshops, emergency weather services, and participation in major ARRL contests. Membership is open to students, faculty, staff, and the general public, with no prior license required, making it a welcoming entry point for new ham radio operators.
nsml.org
NEW!
https://nsml.org/
The North Suburban Math League (NSML) organizes competitive math meets for Chicago-area high schools, with five competitions held throughout the school year. The site provides contest archives, meet schedules, written and oral topic lists, coach resources, and a history of NSML alumni who have earned medals at the International Mathematical Olympiad.
https://m0yng.uk/
Christopher M0YNG is a radio amateur based in Gloucestershire whose personal site covers amateur radio, solar and battery tracking, self-hosted tech, and small computing projects like the Penkesu Tiny Computer. The site is notably available via Gopher, Gemini, and Tor in addition to HTTP, making it a fascinating example of smolnet philosophy in practice.
https://pbcskywarn.com/
PBCSkywarn is the official site for Palm Beach County's Skywarn severe weather spotter network, coordinating volunteer storm spotters across South Florida in partnership with the National Weather Service. Visitors will find repeater frequencies for ham radio weather nets, real-time radar links, Storm Prediction Center outlooks, and National Hurricane Center resources covering the entire South Florida region.
http://laughton.com/paul/rfo/rfo.html
Named in honor of Nobel Prize-winning physicist Richard Feynman, this amateur astronomy site showcases CCD astrophotography of nebulae, planets, and galaxies captured through telescopes ranging from a 4-inch Takahashi to a Celestron C11. Visitors will find detailed equipment reviews, imaging guides, comet and planet sequences, and a rich gallery of deep-sky objects including the Horsehead Nebula, M42, and Hale-Bopp.