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://jgiesen.de/GeoAstro/GeoAstro.htm
Juergen Giesen's GeoAstro Applet Collection offers more than 65 interactive Java applets for tracking the precise positions of the sun, moon, and planets, including sundials, moon phases, eclipse data, and sky maps for any location on Earth. Featured in Sky & Telescope magazine and honored with the Griffith Observatory Star Award, this site is a remarkable labor of love for amateur and professional astronomers alike.
https://astunit.com/astunit_tutorial.php?topic=glossary
The Astronomical Unit is a comprehensive astronomy tutorial site covering everything from choosing a first telescope to positional astronomy, stellar evolution, and debunking pseudoastronomy claims. Visitors will find practical guides, a detailed glossary, book recommendations, DIY telescope projects, and rigorous critiques of popular astronomical myths like the '2012 nonsense' and Apollo conspiracy theories.
http://xjubier.free.fr/en/site_pages/solar_eclipses/TSE_1970_GoogleMapFull.html
Xavier Jubier's interactive Google Map traces the path of the March 7, 1970 total solar eclipse across the USA and Mexico, offering a precise geographic visualization of the event's totality corridor. Part of a larger solar eclipse resource site, this page combines historical astronomical data with modern mapping tools to help enthusiasts and researchers explore eclipse paths.
http://gnarc.org/
The Greater Norwalk Amateur Radio Club (GNARC) is a Connecticut-based ham radio club serving the Norwalk area, featuring meeting minutes, membership info, repeater listings, and event photos. With archives going back to 2013 and active records of club officers, field day activities, and newsletters, this site offers a thorough look at an engaged local amateur radio community.
https://hamqsl.com/
Paul Herrman (N0NBH) built this comprehensive resource for ham radio operators tracking HF propagation conditions, offering free solar-terrestrial data widgets, banners, and tools that can be embedded in any website. Visitors will find online calculators for SFI/SN conversion, K-Index to signal noise, Aurora latitude tools, MUF/LOF prediction maps, and live solar flux and sunspot data updated every few hours.
https://www.qsl.net/w8ea
The Licking County Contest Group (LCCG) is a club of amateur radio operators in Licking County, Ohio who gather around the competitive side of the hobby. The site links to contest resources like ARRL Contests and the KA9FOX DX Library, and serves as a memorial to longtime local ham Otto Geyer, W8EA.
http://smartsonline.org/
SMARTS is the Southwest Metro Amateur Radio Transmitting Society, a ham radio club serving members who are licensed or pursuing their FCC Part 97 amateur radio license. The club hosts weekly nets on the WB0RMK repeater, monthly meetings, and community breakfasts, making it a welcoming hub for both new and experienced ham radio operators.
https://www.qsl.net/ur4eyn
UR4EYN is a Ukrainian amateur radio club station page hosted on QSL.net, the classic hub for ham radio operators worldwide. The site serves as an online presence for the club, likely featuring callsign information, station details, and contact data for fellow operators.
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://rmastro.com/
The Roper Mountain Astronomers (RMA) is a South Carolina astronomy club dedicated to sharing observational skills and astronomical knowledge with enthusiasts of all levels. The site features member astrophotos, club event listings, star parties, outreach programs, and highlights the historic 23-inch Charles E. Daniel Observatory refractor telescope.