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://hamtv.com/
Ham TV is a comprehensive resource for Amateur Television (ATV) run by Tom O'Hara W6ORG, the retired owner of P.C. Electronics, which supplied ATV equipment to ham radio operators for 50 years. Visitors will find technical guides, antenna recommendations, transmitter specs, application notes, and a wealth of practical information for getting started with live color video transmission on amateur radio bands.
https://tornadobob.com/
Bob Conzemius documents his storm chasing and aurora hunting adventures on this personal site, which includes dedicated sections for aurora chases, storm chases, and weather research. The dual focus on severe weather and Northern Lights photography makes it a unique destination for weather enthusiasts and aurora chasers alike.
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://robgendlerastropics.com/
Robert Gendler's astrophotography site showcases a stunning image gallery of astronomical objects alongside essays on 140 popular celestial subjects and a beginner's astronomy primer. The site also features technical articles on advanced imaging techniques like hydrogen alpha color imaging and Photoshop mosaics, plus information about Gendler's published books on astronomy.
https://cpcug.org/user/wfeidt/Arldx/index.html
A personal DX travel resource by W. Feidt, hosted on the Capital PC User Group server, focused on amateur radio DX expeditions and rare entity activations around the world. Visitors will find logs, country information, and expedition details useful for ham radio operators interested in chasing rare DXCC entities.
http://nightskyhunter.com/An%20Observing%20Guide%20To%20Comets.html
Created by Martin McKenna of Nightskyhunter.com, this detailed guide covers everything an amateur astronomer needs to observe comets, from naked-eye viewing to advanced astrophotography and scientific contribution through light curve work. The site includes comet sketches, hunting statistics, observing adventure logs, and links to major comet resources, making it a rich reference for anyone fascinated by these unpredictable visitors to our skies.
https://mnyarc.org/
MNYARC, the Minnesota Youth Amateur Radio Council, is a non-profit 501(c)3 organization dedicated to sponsoring and supporting youth-oriented amateur radio clubs and activities. The site covers events like JOTA, Skywarn Recognition Day, Girl Scout Jamboree participation, online VE licensing exams, and ham radio science projects for young operators.
http://polarimage.fi/
A Finnish sky photography site dedicated to atmospheric phenomena including aurora borealis and noctilucent clouds captured from the high latitudes of Finland. Visitors will find striking images of both day and night skies showcasing some of nature's most dramatic light displays.
https://oeis.org/
The OEIS is a massive searchable database of over 393,000 integer sequences, maintained by the OEIS Foundation and originally created by mathematician Neil Sloane. Researchers, students, and math enthusiasts can look up sequences by entering numbers to identify patterns, explore combinatorics, and discover connections across mathematical disciplines.
http://russsscope.net/staxtutorial.htm
A beginner-focused step-by-step tutorial for stacking and processing planetary images using the free software Registax, written by an astrophotographer who uses a Meade DSI Color camera. The guide walks through alignment, optimization, stacking, and wavelet sharpening in plain language, making it accessible to newcomers who find other tutorials too vague.