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://sss-mag.com/eme.html
Part of the Spread Spectrum Scene (SSS Online) website, this page is a curated link directory focused on Earth-Moon-Earth (EME) moonbounce communications for ham radio operators. Visitors will find links to operator pages, equipment guides, activity loggers, and resources covering weak signal propagation, SETI, DSP, and related amateur radio topics.
http://navicom.com/~w7saa
A personal page for W7SAA, an amateur radio operator with a callsign-based URL suggesting a ham radio hobbyist presence. The site appears minimal, featuring little more than an image, but the callsign identifier strongly marks it as part of the amateur radio community.
https://k8vsy.radio/
K8VSY is the amateur radio blog of a ham radio enthusiast who covers topics ranging from DMR hotspot upgrades and Parks on the Air activations to ham radio conventions like Hamvention 2025. The site also touches on FOSS tools, Raspberry Pi projects, and social media reflections, making it a lively personal record of life on the airwaves.
http://nhastro.com/
The New Hampshire Astronomical Society is a volunteer-run nonprofit dedicated to public astronomy education through skywatches, club meetings, and outreach to schools and libraries across New Hampshire. Visitors can find upcoming observing events, solar and lunar data, a telescope lending program, and resources for amateur astronomers throughout the region.
https://qrp-labs.com/2-uncategorised/44-qrp-labs-shop.html
QRP Labs is a shop and resource hub for amateur radio enthusiasts, offering a wide range of kits including CW transceivers, digital transceivers, GPS receivers, WSPR/QRSS transmitters, and high-altitude balloon trackers. The site features an impressive catalog of homebrew-style radio kits catering to QRP (low power) operators, with supporting documentation, newsletters, and community resources.
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.
https://weather.ral.ucar.edu/upper
RAL Real-Time Weather's Upper-Air page, maintained by NCAR's Research Applications Laboratory, provides real-time rawinsonde plots and upper-atmosphere wind and temperature data across multiple pressure levels from 925mb to 200mb. Researchers and weather enthusiasts can browse SkewT/LogP charts, loop multi-day animations, and access archived upper-air data sponsored by the NSF National Center for Atmospheric Research.
http://calendarzone.com/
The Calendar Zone, created by Janice McLean, is a comprehensive categorized directory of calendar-related links covering art, celestial, cultural, religious, historical, and reform topics. With over 7 million visitors since 1999, it serves as a one-stop hub for anyone curious about calendar systems, moon phases, lunar cycles, and the history of timekeeping across cultures.
http://norcalsetac.org/
The Northern California Regional Chapter of SETAC serves students and professionals in environmental toxicology and chemistry, offering local networking, scholarships, and annual meeting opportunities. The site archives newsletters dating back to 2008 and provides information on board members, sustaining memberships, and a student-mentor lunch program.
https://k5rmg.com/
The Roadrunners Microwave Group (RMG) is a Texas-based amateur radio club focused on operation and technical aspects of microwave communications, particularly on bands above 420 MHz and up to 10 GHz. The site lists meeting schedules, weekly nets, activity nights, and resources for hams interested in pushing into the higher frequency bands.