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://cobaltpet.blogspot.com/
Run by a Northern California hobbyist known as 'weatherall', this blog chronicles shortwave and mediumwave radio listening with detailed reception reports, SIO signal quality codes, station identifications, and portable receiver reviews. Covering international broadcasters, number stations, utility signals, NDB logs, and DXing tips, it's a thorough record of the hobby for fellow shortwave enthusiasts.
https://w3eax.umd.edu/
W3EAX is the Amateur Radio Association at the University of Maryland, a student club with roots going back to 1933 and an ARRL-affiliated callsign. Their well-equipped shack includes HF, UHF/VHF, Amateur Television, and satellite gear, plus a full electronics workbench for hands-on radio experience.
http://uksmg.org/content/deadband.htm
Written by Palle Preben-Hansen (OZ1RH), this technical article explains how radio amateurs can make long-distance contacts on the 50MHz (Six Meter) band by exploiting meteor scatter propagation even when the band appears dead. It covers meteor trail geometry, shower timing, diurnal and seasonal meteor rate variations, and practical operating techniques, with supporting figures and links to software and IARU procedures.
https://pierplates.com/
Dan's Pier Top Plates is a small business site selling custom mounting hardware for backyard telescopes, including pier top plate systems, DIY telescope enclosures, and adapters for metal piers. Hobbyist astronomers looking to build a permanent concrete or metal telescope pier for a home observatory will find products, FAQs, and installation guides here.
https://kd3cpy.neocities.org/
KD3CPY is a compact amateur radio personal page belonging to a Technician-licensed ham operating from grid square FN20kb. The site highlights the operator's callsign, QSL info, and participation in the Amateur Radio Inclusivity Pledge and the Fediverse.Radio web ring.
http://cwp.library.ucla.edu/
Hosted by UCLA, this scholarly archive documents the original scientific contributions of 83 eminent women physicists who worked before 1976, drawing on primary sources including the papers in which their discoveries were first reported. Visitors can explore an annotated photo gallery, historical essays, a searchable database, and firsthand accounts spanning fields from nuclear physics to space physics.
http://gazers.org/
The Penobscot Valley Star Gazers (PVSG) is a Maine-based astronomy club hosting monthly meetings both in-person at John Bapst High School in Bangor and via Zoom. The site offers a calendar of upcoming events, a gallery, an archive, and real-time comet tracking resources for members and stargazing enthusiasts in the region.
https://www.qsl.net/kb9ocq/index.html
Dale Catron (KB9OCQ) built this ham radio personal page focused on the 2-meter band, featuring antenna specs, repeater information, and a dense collection of links covering equipment brands like Icom, Yaesu, Kenwood, and Alinco. The site also includes FCC rules, online practice exams, ARRL resources, and participation in multiple amateur radio webrings from the late 1990s.
https://weather.cod.edu/
NEXLAB at College of DuPage is a meteorology lab and weather data hub offering satellite imagery, radar, numerical models, and local forecasts for the Illinois/DuPage region. Run by COD's meteorology program, it also supports storm chasing activities, academic coursework, and real-time campus weather conditions.
http://ssbusa.com/
SSB Electronic USA is a Pennsylvania-based specialty retailer focused on VHF, UHF, and SHF amateur radio equipment, offering products like GaAsFET preamplifiers, transverter systems, low-noise LNAs, and satellite gear. Featuring brands such as MUTEK, M2 Inc., WinRadio, and AIRCOM, this mid-1990s catalog site serves serious ham radio operators and microwave enthusiasts looking for high-performance RF components.