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)
Brits on top.
NEW!
https://chris.org/
Chris Cox (N0UK/G4JEC) has maintained this personal homepage since 1993, making it one of the longer-running amateur radio personal sites on the web. Visitors will find a Maidenhead Grid Bearing and Distance Calculator, VHF/UHF contest logs, station details, and a much-requested curry recipe thrown in for good measure.
http://setileague.org/
The SETI League is a nonprofit membership organization dedicated to the privatized electromagnetic search for extraterrestrial intelligence, coordinating amateur radio astronomers worldwide in the hunt for signals from other civilizations. The site offers extensive technical resources covering antennas, receivers, and software, alongside publications, press releases, and the popular "Ask Dr. SETI" column.
https://qsl.net/swlham
Mike (KC9LDO) runs this amateur radio hub packed with real-time propagation data, DX news feeds, solar and geomagnetic condition monitors, and links to DX logs and QSL resources. It serves as a handy dashboard for ham radio operators interested in VHF, DX chasing, and band conditions across multiple frequencies.
http://cimss.ssec.wisc.edu/goes/goesdata.html?fbclid=IwAR1tJwdbaRkZL3OS55qttm0KXOx16pK2Mw2uGiGqFSr_WDBDL4FuR8l7eEE
Maintained by Tim Schmit at CIMSS/SSEC (University of Wisconsin-Madison), this comprehensive link directory aggregates GOES satellite imagery sources from NOAA, NASA, and international agencies including Brazil, Mexico, Chile, and Canada. Visitors can access real-time ABI imagery across all bands, mesoscale sectors, full-disk views, and animated GIFs from dozens of platforms covering both GOES-East and GOES-West.
http://okie-tex.com/index.php
The Okie-Tex Star Party is an annual astronomy event held at Camp Billy Joe in the Black Mesa area of Oklahoma, offering some of the darkest skies in the Southwest for stargazers. The site covers everything attendees need, including registration, event schedules, observing lists, meal menus, accommodation info, and a photo gallery from past gatherings.
https://www.qsl.net/n5tle
Kelly Kohls (N5TLE) shares his amateur radio interests alongside a collection of DMX512 electronics projects built around the PIC16F876 microcontroller, including source code, hex files, schematics, and functional descriptions. The site is a practical resource for anyone interested in DMX512 lighting control interfacing with analog voltage converters using PIC microcontrollers.
http://kusastro.kyoto-u.ac.jp/vsnet
VSNET is an international mailing list network based at Kyoto University dedicated to real-time alerts and collaborative observation of variable stars, cataclysmic variables, novae, supernovae, and X-ray binaries. Hosting decades of light curve archives from AFOEV observations and ongoing amateur-professional collaboration campaigns, it serves as a serious citizen science hub for variable star astronomy worldwide.
http://c14isawesome.blogspot.com/
Stephen Saber, an amateur astronomer, shares deep-sky observing lists, lunar phenomena like Saber's Beads, and stargazing tips on this enthusiast blog. Catalogued targets from the Messier, Caldwell, RASC, and Herschel 400 lists make it a practical resource for marathon observers hunting NGC objects.
https://pskreporter.info/pskmap.html
PSKReporter is a real-time propagation mapping tool that aggregates reception reports from amateur radio operators worldwide, showing who is hearing whom across bands and digital modes like FT8, JT65, and PSK31. Created by Philip Gladstone, the interactive map lets operators filter signals by callsign, country, grid square, mode, and time window, making it an invaluable tool for monitoring radio propagation conditions.
https://www.qsl.net/dl4mea
Günter Köllner (DL4MEA) shares his extensive ham radio station based near Munich, Germany, with a focus on VHF, UHF, SHF, and EME (Earth-Moon-Earth) communication across multiple bands from 144MHz up to 5760MHz. Nearly all of his equipment is homemade, and the site details his rigs, antennas, worked squares maps, and beacon operations including the experimental beacon DB0FAI.