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://www.qsl.net/mvarg
The Mystic Valley Amateur Radio Group is a club based in eastern Massachusetts that meets monthly at Tufts University in Medford, welcoming anyone interested in the amateur radio hobby. The site lists club officers, repeater information, and a variety of ham radio links including ARRL resources, emergency management contacts, and local net listings.
http://arrl.org/
The American Radio Relay League (ARRL) is the official national membership organization for amateur radio operators in the United States, offering news, licensing resources, regulatory advocacy, and publications like QST magazine. A comprehensive hub for ham radio enthusiasts at every level, the site covers contests, digital networking, solar updates relevant to propagation, and community events.
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://www.qsl.net/wa6bgs
The Amateur Radio Club of El Cajon (WA6BGS) is an ARRL Special Service Club serving San Diego County, with information on monthly meetings, membership applications, and T-Hunting activities. The site includes a preserved 2005 version for historical reference alongside solar and geomagnetic field status indicators popular among ham radio operators.
https://pi4cc.nl/
PI4CC Contest Club is a Dutch amateur radio club operating from a World War II bunker at Hoek van Holland since 1993, specializing in HF multi-operator contest entries. The site offers a detailed station tour, antenna specifications, contest stories, DX-trip logs, and member information for this technically impressive homebrew contest station.
https://f1rum.fr/
F1RUM's blog is a French amateur radio enthusiast's personal journal covering topics like Meshtastic mesh networking, Morse code learning challenges, SOTA field operations, SDR hardware, and digital modes like MFSK. The site also includes a logbook and digimap, and participates in the Fediverse.Radio web ring, making it a genuine hub for the radioamateur community.
https://skyhound.com/sh/dso_guide.html
Skyhound's Guide to Deep Sky Objects is a comprehensive reference covering every major category of deep sky objects, from open star clusters and globular clusters to quasars and gravitational lenses. Each section explains what the objects are, how they appear through a telescope, and highlights notable examples like the Veil Nebula, Einstein's Cross, and the Pleiades.
https://julianbunn.org/
Julian Bunn is a computational scientist at Caltech with a background in particle physics at CERN, DESY, and the Rutherford Appleton Laboratory, now working on seismology and earthquake early warning systems like ShakeAlert. His sprawling homepage serves as a personal aide-memoire covering decades of scientific work, publications, ham radio, genetic algorithms, and even obscure retro computing projects from the DECUS era.
https://ciura.tripod.com/index.html
Steve (KB9JWD) is a ham radio operator and trained weather spotter from Downers Grove, Illinois who built this page to share his twin passions for amateur radio and meteorology. Visitors will find links to SKYWARN spotter gear, the QRZ callsign database, amateur radio practice exams, local radio club pages, and weather resources.
https://vcas.org/
The Ventura County Astronomical Society (VCAS) brings together stargazers of all ages in the Thousand Oaks, California area through monthly lectures, star parties, Messier marathons, and community outreach events. Members enjoy access to loaned telescopes, remote viewing field trips, and a quarterly astronomy magazine, making this a rich hub for both beginner and experienced amateur astronomers.