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://jessystems.com/
Pete Juliano, N6QW, shares decades of hands-on ham radio construction experience through detailed homebrew projects covering QRP and QRO SSB transceivers, linear amplifiers, and PIC microcontroller applications. A licensed ham since 1959 with multiple callsigns, Pete also documents restorations of classic rigs like the Heathkit HW-101 and Collins KWM2, plus publications in QRP Quarterly.
https://dxnews.com/
DXnews.com is a comprehensive news hub for ham radio operators, covering DX expeditions to rare and remote locations like Antarctica, Svalbard, and the Marquesas Islands. The site tracks upcoming and active DX peditions, contest activity, IOTA references, and community forum posts, making it an essential resource for DXers worldwide.
https://solarviews.com/cap/index
Created by Calvin J. Hamilton, Views of the Solar System is an expansive photo gallery cataloging images of every planet, moon, asteroid, comet, and deep-space phenomenon in our solar system and beyond. With hundreds of categorized photos organized by target and feature type, including spacecraft missions like Cassini, Voyager, and Curiosity, it serves as a rich visual reference for space enthusiasts and students alike.
http://xmlog.com/
XMLog is a free amateur radio logbook application for Windows, created by Michael McAmis (W1ECT), offering flexible log searching, awards tracking for DXCC, WAZ, and WAS, LoTW integration, and callbook lookups. The site serves as the official download and support hub for the software, with documentation, beta releases, and a linked community group on groups.io.
http://sten.astronomycafe.net/the-astronomy-cafe
NASA scientist-educator Sten Odenwald has maintained this astronomy education hub for over 20 years, filling it with popular essays on cosmology, black holes, space travel, and the weird corners of nature. Visitors will find Q&A resources, blog posts on recent space discoveries, and details on his published books including a photo-filled history of space exploration through 100 iconic objects.
https://w9fz.com/
Bruce Richardson's personal hub site collects his various web projects, with ham radio travelogues and VHF Society conference coverage sitting alongside sections on Boy Scout councils, military air base history, and surplus electronics for sale. The callsign W9FZ anchors the site and the ham radio content is the most distinctive thread running through his online presence.
https://www.qsl.net/n1irz
Dave Finley (N1IRZ) shares his deep expertise in amateur radio through articles on Morse Code training, radio history, and radio astronomy, including information about his published book 'Morse Code: Breaking the Barrier.' The site covers an impressive range of topics from the Koch Method of CW training to QRP radio kits, six meters, and the history of ham radio in Socorro, New Mexico.
https://cbastro.org/
The Center for Backyard Astrophysics (CBA) is a global citizen-science network of amateur astronomers using small telescopes to conduct photometric studies of cataclysmic variable stars. The site hosts science results, publications, data submission guidelines, observer resources, and a worldwide station map connecting contributors from Belgium to Indiana.
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.
http://trafficwaves.org/
William J. Beaty, an electrical engineer from Seattle, explores the fascinating physics of traffic jams, treating highway congestion as fluid dynamics and demonstrating how a single driver can dissolve traffic waves. The site features animations, videos, experiments, and links to academic research on 'jam-absorption driving,' making it a surprisingly deep dive into an everyday phenomenon.