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://gsbarc.org/
The Great South Bay Amateur Radio Club (GSBARC) has served the Babylon, NY area on Long Island for over 55 years, coordinating public service events, emergency communications through ARES/RACES, and licensing education. Visitors can find club newsletters, repeater information, net schedules, upcoming contest dates, and special event certificates all in one place.
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://webmineral.com/
Webmineral is a comprehensive mineralogy database created by David Barthelmy, cataloging 4,714 individual mineral species with detailed descriptions, crystal structure viewers, X-ray data, chemical formulas, and an extensive image library. Its interactive Java-powered crystal viewers, searchable indexes across dozens of physical and optical properties, and multi-language support make it an invaluable reference for geologists, collectors, and mineral enthusiasts alike.
http://tropic.ssec.wisc.edu/
Run by the Cooperative Institute for Meteorological Satellite Studies at the University of Wisconsin-Madison, this site provides real-time satellite-based analysis tools and data products for tracking and studying tropical cyclones worldwide. Researchers and weather enthusiasts alike will find an impressive suite of tools including intensity estimation algorithms, microwave imagery composites, and a full archive covering Atlantic, Pacific, Indian Ocean, and South Pacific storm basins.
http://foxdelta.com/
Fox Delta, operated by K7SFN, I2TZK, and VU2FD, is a direct-sales kit shop and project resource for amateur radio enthusiasts, offering RF amplifiers, SWR meters, antenna rotator software, and more. The site features a range of active and previous hardware kits including the PA-100 IRF510 RF amplifier and ST2 USB interface, all sold exclusively through this site with no third-party dealers.
http://cbat.eps.harvard.edu/index.html
The Central Bureau for Astronomical Telegrams (CBAT), hosted at Harvard University since 1966, is the official IAU clearinghouse for announcing new astronomical discoveries including comets, novae, supernovae, and other transient celestial events. Visitors can browse online IAU Circulars, subscribe to discovery feeds, explore lists of supernovae and comets, and learn how to submit their own astronomical observations.
http://bobsknobs.com/
Bob's Knobs sells specialized collimation thumbscrews that let telescope owners align their Cassegrain and Newtonian telescopes without any tools. The product line covers knobs for popular telescope brands including Losmandy, Celestron, and TeleVue mounts, with custom sizing options and downloadable installation guides.
https://n3vem.com/blog
N3VEM is Vance Martin's ham radio blog covering repeater projects, AREDN mesh networking, antenna builds, and special event stations like the CQ Salk activation. The site documents ongoing technical projects including the Radio Rocket and r4e repeater builds, with posts spanning portable operations, field day, and POTA activities.
http://astronomy.net/
Astronomy.Net is a comprehensive hub for amateur and professional astronomers alike, offering articles, forums, constellation guides, sky event calendars, and equipment classifieds all in one place. Built and maintained by John Huggins since 1994, the site covers everything from telescope optics and astrophotography to meteor showers and planetary conjunctions.
https://norwichastro.org.uk/useful-links
The Norwich Astronomical Society maintains this curated links page pointing visitors to national bodies, local clubs, observatories, and online resources for amateur astronomers in the UK. Based at Seething Observatory in Norfolk, the society offers a well-organized gateway to stargazing locations, observing programmes, and space science topics including meteorites and solar sails.