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://itis.gov/
ITIS is the official Integrated Taxonomic Information System, a partnership between U.S. federal agencies and global specialists providing authoritative scientific names and taxonomic classifications for plants, animals, fungi, and microbes worldwide. Researchers and biodiversity professionals can search by common name, scientific name, or TSN identifier, access hierarchical taxonomic reports, and download the full database for integration into their own projects.
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.
https://sites.uni.edu/morgans/astro/course/Notes/section2/spectralmasses.html
A detailed reference table from a university astronomy course listing spectral types of stars across main sequence, giant, and supergiant classifications, with corresponding temperature, absolute magnitude, luminosity, and mass values. Covering everything from scorching O5 stars down to cool T8 brown dwarfs, this page serves as a compact but comprehensive stellar classification resource for students and enthusiasts alike.
http://zl2ctm.blogspot.com/2025/01/40m-pelican-case-ssb-trabsceiver.html
Charlie Morris (ZL2CTM) documents his amateur radio homebrew experiments, including this detailed post on building a 40m SSB transceiver housed in a Pelican case, complete with Arduino code for the Si5351 VFO and LCD control. The blog covers hands-on RF construction projects with schematics, code snippets, and supporting YouTube videos, making it a great resource for homebrewers interested in building their own transceivers.
https://dsimanek.vialattea.net/home.htm
Donald Simanek, a physics professor, has assembled a sprawling collection of resources covering physics puzzles, perpetual motion machines, pseudoscience debunking, creationism criticism, and science humor. Highlights include the Museum of Unworkable Devices, illustrated lectures, and a rich archive of skeptical and educational content that has earned recognition as one of the top skeptical websites on the web.
https://ring.fediverse.radio/
Fediverse.Radio WebRing connects 35 amateur radio enthusiast sites whose operators are active on the Fediverse, the decentralized social network. Run by M0YNG, a licensed radio amateur in Gloucestershire, the ring makes it easy to discover blogs, personal pages, and resources from ham radio operators around the world.
https://sbau.org/default.html
The Santa Barbara Astronomical Unit (SBAU) is an active astronomy club based in Santa Barbara, California, hosting monthly public meetings featuring talks by prominent researchers from NASA, JPL, and leading universities. The site offers event calendars, dark sky site listings, equipment for sale, newsletters, and a rich archive of past speaker videos dating back to 2008.
http://nu5de.org/
The Naturist Amateur Radio Club (NU5DE) is a unique ham radio club that operates from Star Ranch Nudist Resort in McDade, Texas, combining nude recreation with amateur radio operations. The site showcases their custom QSL cards, including their award-winning 'barefoot' design, and documents their on-air activities during Nude Recreation Week from 2001 onward.
http://nmia.com/~roberts/robert.html
Robert Smathers maintains this personal hub dedicated to TVRO (Television Receive Only) satellite reception, featuring links, schedules, mail lists, newsgroups, and dealer resources for satellite hobbyists. The site also touches on visual satellite observing and space topics, making it a useful reference point for backyard dish enthusiasts.
https://qsl.net/lu2ee
A QSL.net-hosted page for the amateur radio callsign LU2EE, indicating an Argentine ham radio operator with a personal station page. The site appears to be a file directory index, likely containing logs, images, or station information typical of ham radio operator pages on the QSL.net network.