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://bratsatv.org/
The Baltimore Radio Amateur Television Society (BRATS) is a non-profit amateur radio club based in Baltimore, Maryland, focused on ATV (amateur television) repeaters, emergency communications, and public service. The site features club news, meeting announcements, technical writeups on their ATV repeater revival project, and information on joining the organization.
https://crawford.tardigrade.net/journal/index.html
Rod Crawford's Spider Collector's Journal chronicles decades of arachnid collecting expeditions from 1986 through the present, including trips to the Russian Kuril Islands and Sakhalin Island. The site features year-by-year narrative accounts, photo albums, and detailed documentation of tools and techniques used in scientific spider collection.
https://qsl.net/kd5fjm
The Dyess AFB Amateur Radio Club (DARC), callsign KD5FJM, is the official ham radio club for Dyess Air Force Base in Texas, featuring links to club news, member lists, station info, SKYWARN severe weather resources, and AF MARS connections. The site reflects a club in transition, actively seeking new leadership to revitalize its activities among amateur radio operators in the Dyess area.
http://hf.dxview.org/
Created by NG0E, HF+ is an interactive real-time propagation map that displays current amateur radio band conditions worldwide from 1.8 to 50.4 MHz, showing where contacts are likely based on your operating location. It draws live data from sources like WSPRnet, PSK Reporter, and the Reverse Beacon Network to indicate support for SSB, CW, and digital modes, and even predicts signal levels for the next 24 hours.
http://astronomical.org/
The Peoria Astronomical Society is a non-profit club for amateur astronomers in Peoria, Illinois, offering membership information, meeting schedules, constellation resources, and a newsletter archive. With links to their observatories, planetarium visits, and a learning center, this site serves as a hub for stargazers in the central Illinois community.
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://w5ac.tamu.edu/
W5AC is the Texas A&M University Amateur Radio Club, founded in 1912, making it one of the oldest university radio clubs in existence. The site covers club meetings, repeater information, nets, field day events, emergency communications, and free license exam sessions open to students and the public.
http://cometography.com/lcomets/2006p1.html
Gary W. Kronk's Cometography provides a detailed scientific profile of Comet C/2006 P1 (McNaught), covering its discovery, orbital calculations, and observer reports from around the world. The page includes historical highlights of the comet's brightness predictions, perihelion data, and observation logs with magnitudes and coma measurements, along with photographs taken at Paranal Observatory.
https://wxlog.com/
Stephen's Storm Log is a personal storm chasing diary cataloging hundreds of tornado, supercell, and severe weather chase events dating back to 1997, organized by SPC risk level and year. With decades of documented chases across the American South and Plains, this is a remarkable long-running record of one chaser's adventures tracking some of the most intense storms on record.
http://jgiesen.de/welcomeEnglish.htm
A rich hobbyist resource by J. Giesen featuring an extensive collection of Java and JavaScript applets covering astronomy topics like sun and moon phases, planet positions, sundials, Venus transits, and satellite observation. Visitors will also find physics quizzes, chaos and fractal simulations, color theory tools, and links to books and software, making it a deep interactive playground for science enthusiasts.