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://astronomy-links.com/
Clark M. Thomas of Roanoke, VA has assembled a free, non-commercial collection of astronomy links organized to help stargazers at all experience levels discover resources, from deep sky databases and space telescope galleries to star party listings and homework help. Highlights include curated 'Best of the Best' picks, a newest-links section for returning visitors, and a broad sweep of resources covering Mars missions, the Messier catalog, observing clubs, and more.
https://perezmedia.net/ceruleanarc/storm-chase-sum.html
Jeremy Perez's Cerulean Arc is a detailed storm chasing blog featuring firsthand summaries of tornado intercepts and severe weather events across the American Southwest and Great Plains, stretching back to 2009. Each entry combines narrative field accounts with meteorological analysis, road network strategy, and storm photography, making it a compelling read for weather enthusiasts and chasers alike.
https://umbra.nascom.nasa.gov/eclipse/980226/text/filter-sources.html
Part of NASA Reference Publication 1383, this page provides a curated list of U.S. vendors selling mylar and glass solar filters safe for eclipse and solar viewing with or without a telescope. It includes contact details for well-known optics companies like Celestron, Meade, and Orion, making it a practical companion resource for amateur astronomers preparing for solar observation.
https://solorb.com/elect
FC's Electronic Circuits is a sprawling hobbyist archive packed with schematics and project descriptions covering everything from solar charge controllers and LED circuits to tube amplifiers, Geiger counters, and amateur radio gear. With dozens of original circuit designs, Arduino projects, and links to related ham radio and electronics builders, this site is a goldmine for DIY electronics enthusiasts.
https://bsasnashville.com/
The Barnard-Seyfert Astronomical Society (BSAS) is a Nashville, Tennessee astronomy club that hosts regular public star parties, member meetings, and educational events at local parks and nature centers. Visitors can find event schedules, membership information, a member-produced wall calendar featuring astrophotography, and resources for amateur astronomers including discounted access to the Observer's Handbook.
https://wm7d.net/hamradio
WM7D dot Net is Mark A. Downing's extensive amateur radio link directory, organized into dozens of categories covering antennas, DX clusters, propagation, QRP, Morse code, satellite info, and much more. With five pages of curated links spanning everything from ARRL headquarters to shortwave and six-meter sites, it serves as a comprehensive reference hub for ham radio enthusiasts.
https://qsl.net/ve6ria
A QSL.net-hosted page belonging to the amateur radio operator with callsign VE6RIA, a Canadian ham radio licensee. The site appears to be a personal radio operator page on the popular QSL.net hosting platform for ham radio enthusiasts.
https://iasindy.org/
The Indiana Astronomical Society is a membership-based club dedicated to amateur astronomy, offering monthly public lectures, access to the historic Goethe Link Observatory, dark-sky observing sites, and outreach programs for students across central Indiana. With resources ranging from a beginner Astronomy 101 crash course to star party event listings and a member collaboration site, it serves everyone from curious newcomers to seasoned sky watchers.
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://qsl.net/kb1ckf/ham_radio_links.htm
Mike (KB1CKF) has assembled a comprehensive ham radio links page covering SATERN emergency communications chapters, Massachusetts amateur radio clubs, ARRL resources, repeater directories, and major radio equipment manufacturers. A handy reference for New England amateur operators, with particular emphasis on emergency radio networks and local clubs in the Eastern Massachusetts area.