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://cometography.com/
Cometography.com is a scholarly reference site originally built by Gary W. Kronk, companion to his six-volume Cambridge University Press book series, offering in-depth historical data on periodic and notable comets throughout history. Now maintained by José J. Chambó, the site preserves and expands Kronk's decades of comet research for astronomers and enthusiasts alike.
http://trx-manager.com/
TRX-Manager, created by Laurent F6DEX, is a CAT control, DXing, and logging software package supporting nearly 150 transceivers including models from Yaesu, Kenwood, Icom, and Elecraft. Though distribution has been discontinued, the site still provides updates for registered users and bilingual support in both English and French.
https://astronomy-links.net/
Clark M. Thomas of Roanoke, VA has assembled one of the most comprehensive astronomy link directories on the old web, covering everything from cosmology and black holes to amateur CCD imaging and deep sky observing. Alongside the curated links, Clark shares his own original essays on topics ranging from dark matter and primordial black holes to UFO phenomena and climate change, making this both a jumping-off point and a destination in itself.
http://n0hr.com/
N0HR.com is a hub for amateur radio operators, offering PocketPC ham radio software including MobileLog 2 for contact logging, PPCMorse for learning Morse code, and PocketDigi for digital modes like PSK31 and RTTY. The site also features a large curated and user-rated ham radio links directory, HF propagation tools, a DXPedition map, and a blog covering tower projects, contests, and DX activity.
https://astronomy-links.net/lifeonwanderingplanets.html
Clark M. Thomas presents a speculative essay on the possibility of life on wandering planets and dark solar systems, drawing on extremophile biology and decades of independent astronomical thinking. The piece weaves together astrophysics, astrobiology, and theology, touching on exoplanets, Europa, HIV research history, and UFOs as part of the author's idiosyncratic intellectual journey.
http://andrewscom.com.au/
Andrews Communications is an Australian retailer specializing in marine radio, telescopes, binoculars, scanners, CB radio, and test equipment. The shop serves customers across Australia with a broad range of optical and electronic communication products.
http://mistisoftware.com/astronomy/index.htm
Misti Mountain Observatory is an amateur astronomy site featuring stunning astrophotography captured with a 32-inch Ritchey-Chretien telescope in Arizona, covering galaxies, nebulae, star clusters, and solar system objects. The site includes detailed equipment notes, film and CCD imaging data, conference listings, and even a specialized app that lets blind and visually impaired users explore astronomical images through musical tones.
https://members.tripod.com/~Sam_KD6PIZ/index.html
Samuel Thornton (KD6PIZ) shares his ham radio hobby alongside family photos and links to WWII warbird organizations on this classic Tripod personal page. An active U.S. Air Force member stationed in Columbus, Mississippi, Sam mixes his passion for amateur radio with interests in historical aircraft like the B-17 and B-24.
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://qsl.net/k7par
The Puget Amateur Radio Society (PARS) is a general interest amateur radio club based in the Bellevue/Redmond, Washington area, meeting monthly at the North Bellevue Community Center. The site lists club officers, meeting details, and resources like bylaws and meeting minutes, and welcomes both licensed hams and newcomers interested in earning their first license.