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://theastronomycafe.net/
An archived recreation of Dr. Sten Odenwald's legendary 'Astronomy Cafe' website from circa 2001, once a destination where a professional astronomer answered thousands of public questions about space, the universe, and infrared astronomy. The site preserves a nostalgic snapshot of early web science outreach, featuring Dr. Odenwald's books, his 'Ask the Astronomer' feature, and philosophical explorations of concepts like 'nothing' and the Big Bang.
https://arca-az.org/
The Arizona Repeater Council of Arizona (ARCA) appears to be an organization coordinating amateur radio repeater operations across the state of Arizona. The site uses frames-based navigation, suggesting an older web presence dedicated to ham radio coordination and regional repeater management.
https://aprs.org/
The original home of APRS (Automatic Packet Reporting System), a ham radio digital communications protocol developed by Bob Bruninga (WB4APR) that allows operators to share real-time position, weather, messages, and event data over a single national channel. Now maintained for historical purposes, the site archives over two decades of APRS development including presentations, technical guides, satellite projects, and links to balloon launches and digipeater resources.
https://cosmotography.com/index.html
Cosmotography is the astrophotography showcase of R. Jay Gabany, a 2010 AAS Chambliss Amateur Achievement Award recipient who captures stunning CCD images of galaxies, nebulae, star clusters, and more using high-end telescopes across multiple observatories worldwide. The gallery features meticulously processed multi-exposure color images taken through remotely controlled observatories in California, Kitt Peak Arizona, and Melbourne Australia, making it a remarkable window into deep-sky imaging at the amateur-professional frontier.
http://kstrom.net/isk/stars/starmenu.html
Created by Paula Giese, this richly detailed site explores Native American and Aboriginal astronomy, covering Lakota star knowledge, sacred star maps, medicine wheels as solar-stellar observatories, and indigenous constellation traditions. It serves as an educational hub with links to Lakota theology, archaeoastronomy, star stories, and teacher resources for native-centered science curricula.
https://dra73.org/
The Delaware Repeater Association (DRA) is a ham radio club founded in 1973 that maintains repeaters across Delaware and holds quarterly in-person meetings at the Route 40 Diner in Bear, DE with a Zoom option for remote members. The site covers club membership, dues, leadership, meeting schedules, and links to regional amateur radio resources including ARES groups and VE testing.
https://qsl.net/wa2lqo
The Grumman Amateur Radio Club (WA2LQO) is a Long Island, New York club site covering repeater status, special event stations, VE testing sessions, and club newsletters. Highlights include historical photos from lighthouse operations aboard the Nantucket Lightship and decades of club social gatherings dating back to the early 2000s.
https://tgale.home.xs4all.nl/valves.html
Trevor Gale's comprehensive reference site covers vintage vacuum tubes and valves, offering pinout data, characteristics lists, military-to-commercial conversion tables, repair hints, substitution guides, and circuit diagrams for old receivers and amplifiers. Maintained as a companion to the rec.antiques.radio+phono newsgroup FAQ, it serves as a practical technical resource for both seasoned restorers and newcomers to valve/tube circuitry.
http://ibiblio.org/virtualcell/tour/cell/cell.htm
The Virtual Cell is an interactive educational tour of a biological cell, using extensive imagery to guide visitors through cellular structures and components. The included pronunciation guide and visual-heavy layout suggest this is a reference resource designed to help students and curious learners explore cell biology in an engaging, self-guided format.
https://pembsbirds.blogspot.com/
Pembrokeshire Birds is a long-running blog dedicated to birdwatching observations across Pembrokeshire, Wales, covering sightings from notable sites like Skokholm Island and Teifi Marshes. With records dating back to 2008, annual reports, species lists, and detailed field notes, it serves as a rich regional ornithological resource for birders interested in Welsh wildlife.