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)
http://thearac.org/
The Arrowhead Radio Amateurs Club (ARAC, W0GKP) is one of the oldest ham radio clubs in the region, founded in 1929 to promote amateur radio in northeastern Minnesota and northwestern Wisconsin. The site offers club meeting details, repeater information, Skywarn weather monitoring links, education and testing session resources, and membership information for the Duluth-Superior Twinports area.
https://antenna.it/
Giovannini Elettromeccanica is an Italian antenna manufacturing company specializing in HF antenna systems for both military and commercial applications, covering the RF spectrum from 1.5 to 30 MHz. Their product catalog includes log-periodic antennas, broadband wire dipoles, fiberglass masts, antenna rotators, and towers, with research, design, manufacturing, and support services all offered in-house.
https://www.qsl.net/9m6aac/old/aacmem.htm
The Hillview Gardens Amateur Radio Club (9M6AAC), based in Keningau, Sabah, Malaysia, maintains this membership directory listing callsigns and contact details for its globally dispersed ham radio members. The roster spans operators from dozens of countries, reflecting the club's mission of promoting worldwide friendships through amateur radio.
https://sharc.net/
The South Hills Amateur Radio Club (SHARC) is a 501(c)(3) non-profit based in Pittsburgh, Pennsylvania, serving ham radio enthusiasts across the South Hills region with callsigns KS3R, N3WX, and W3PIT. The site offers detailed information on club repeaters, Field Day events, membership, VE testing schedules, and an extensive swap-and-shop classifieds section for amateur radio equipment.
https://www.qsl.net/mid-islandarc
The Mid-Island Amateur Radio Club (MIARC) serves ham radio enthusiasts on Long Island, New York, with club info covering repeaters, membership applications, and Field Day photos. A community hub for local hams, the site also features a bulletin board, swap shop, and links to related resources including VE exam info and ARRL connections.
http://bbastrodesigns.com/
Mel Bartels runs this personal hub covering amateur telescope making alongside his BBAstroDesigns venture and beekeeping with top bar hives. The site blends hands-on astronomical craftsmanship with natural observations like ice spikes, sun rainbows, and sun pillars.
http://dendro.cnre.vt.edu/
Virginia Tech's Dendrology and Forest Biology site is a comprehensive academic resource for tree identification, featuring factsheets, ID keys, a vTree app, and databases covering superlative and remarkable trees. Built by Dr. John Seiler, John Peterson, and collaborators, it serves as a go-to reference for students, landowners, and naturalists interested in woody plants across North America.
http://astrometry.org/
Astrometry.org is an educational resource by Istituto Scientia dedicated to popularizing astrometry and celestial mechanics, two of astronomy's oldest classical branches. Visitors can explore topics like star positions, orbital mechanics, the SAO star catalog, and an online planetarium, with historical context tracing these sciences from ancient Greece through Galileo and Newton.
https://rammb-data.cira.colostate.edu/tc_realtime
Run by NOAA's Regional and Mesoscale Meteorology Branch at Colorado State University, this site tracks currently active tropical cyclones worldwide in real time using satellite imagery and meteorological data. Researchers and weather enthusiasts can browse live storm data, archived seasons going back to 2006, and products developed by NESDIS/STAR/RAMMB scientists.
http://solstation.com/habitable.htm
Sol Station explores the concept of habitable zones around stars, presenting scientific information about which stellar systems might support life. The site offers a visually driven look at astrobiology and planetary habitability, making complex astrophysics accessible to curious visitors.