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://qsl.net/ke6wuk
A QSL.net-hosted personal page for amateur radio operator KE6WUK, part of the popular free web hosting service dedicated to ham radio enthusiasts. The directory index is essentially empty or inaccessible, offering no visible content beyond a bare file listing.
http://astrophysical.org/
Astrophysical.org is a scientific popularization site run by Istituto Scientia, covering astrophysics and astronomy with sections on stars, magnitude, an online planetarium, and the SAO star catalog. Visitors can explore topics from stellar spectral classification to cosmology, with links to companion site Astrometry.org for celestial mechanics content.
https://www.qsl.net/oe7cwj
Christian Wieser's amateur radio page, hosted on QSL.net under the callsign OE7CWJ, appears to be a minimal personal station page that redirects visitors to a new site at qsl.net/oe3cwj. The QSL.net domain and Austrian callsign prefix make clear this belongs to a licensed ham radio operator from the OE (Austria) region.
https://johnshepler.com/articles/piday.html
John Shepler's engaging article celebrates Pi Day and explores the fascinating history of the transcendental number pi, from ancient scholars to modern supercomputers crunching billions of decimal places. Packed with fun facts, literary references, and links to birthday calculators and playlists, it makes mathematics genuinely entertaining for casual readers and math enthusiasts alike.
http://njqrp.org/
The New Jersey QRP Club is a community organization for amateur radio enthusiasts focused on low-power (QRP) radio operation and homebrew electronics projects. Visitors will find sprint contest results, homebrew project showcases, TeamSpeak design sessions, and resources for QRP builders in the New Jersey region.
https://clavius.org/
Moon Base Clavius is a thorough, well-organized resource dedicated to debunking Apollo moon landing conspiracy theories, drawing on contributions from both amateurs and professionals. Visitors will find detailed analyses of Apollo photographs, environmental conditions, technology, space vehicles, and the logical fallacies underpinning hoax claims.
http://stargazing.net/mas
The Muskegon Astronomical Society is a Michigan-based non-profit astronomy club founded in 1972, with its own multi-building observatory complex and an active membership of stargazers. The site features astrophotography from members including nebulae, auroras, comets, and Saturn, plus comet ephemeris tools, observing links, a club events calendar, and JavaScripts for night sky calculations.
https://lwca.net/
The Longwave Club of America (LWCA) is a dedicated organization serving enthusiasts of radio frequencies below 500 kilohertz, covering LF, VLF, MedFER, HiFER, and Part 15 experimental beacons. Members receive 'The Lowdown,' a bimonthly publication dating back to 1974, featuring DX loggings, homebrew antenna projects, natural radio phenomena, and news from operators around the world.
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://sarts.org.sg/
The Singapore Amateur Radio Transmitting Society (SARTS) is the national organization for ham radio enthusiasts in Singapore, offering resources on licensing, frequency bands, and getting started with amateur radio. The site features news posts on topics like FreeDV signals, web SDRs, and satellite launches, along with a marketplace, gallery, and membership information for the local ham community.