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://farside.ph.utexas.edu/
Richard Fitzpatrick is a Professor of Physics at the University of Texas at Austin, specializing in fusion studies, with this page serving as a hub for his research, teaching materials, academic papers, talks, and books. Visitors interested in plasma physics or fusion energy will find a gateway to substantial scholarly resources from an active academic researcher.
https://www.qsl.net/sra
The Sierra Radio Association's former web presence, now redirecting visitors to their new home at k6sra.org. This amateur radio club page serves as a forwarding notice for members and ham radio enthusiasts looking to connect with the organization.
https://astropublishing.com/
Astro Publishing offers a free multilingual astronomy magazine available to read and download in full, with a mission to bring astronomy culture to the widest possible audience. All issues can be accessed directly from the site, which is notable for its strict no-tracking, no-cookie privacy policy.
https://macastro.org.au/
The Macarthur Astronomical Society serves amateur astronomers in Sydney's south west, offering field nights at multiple observation sites, astro imaging workshops, citizen science projects, and a Deep Space Hunt program. With resources like the Messier and Caldwell lists, ISS tracking, sky conditions, and a 2028 Solar Eclipse planning page, this is a well-rounded hub for a genuinely active local astronomy club.
https://asgh.org/legacy/links.htm
The Astronomical Society of Greenwich Hills (ASGH) maintains this curated links page connecting amateur astronomers to periodicals, regional astronomy clubs, observatories, equipment suppliers, and NASA educational resources. A thorough reference hub for stargazers in Connecticut and New England, it lists dozens of affiliated clubs and organizations alongside tools for both hobbyists and kids.
https://antenna.it/
Giovannini Elettromeccanica is an Italian antenna manufacturing company specializing in HF antenna systems for both military and commercial applications, covering the RF spectrum from 1.5 to 30 MHz. Their product catalog includes log-periodic antennas, broadband wire dipoles, fiberglass masts, antenna rotators, and towers, with research, design, manufacturing, and support services all offered in-house.
https://repeater-builder.com/
Repeater Builder is a dedicated resource for amateur radio enthusiasts focused on building, modifying, and maintaining repeater systems. The site dives into the technical side of ham radio infrastructure, making it a go-to reference for hobbyists who want to construct or upgrade their own repeaters.
https://electronics-notes.com/
Electronics Notes, created and maintained by engineer Ian Poole, is a comprehensive reference hub covering electronics theory, circuit design, components, radio technology, antennas, ham radio, and more. With tutorials aimed at everyone from hobbyists to professionals, it also offers downloadable guides, infographics, and component data sheets, making it a genuinely useful destination for anyone working with electronics.
https://illinoiswildflowers.info/
Created by Dr. John Hilty, Illinois Wildflowers is a comprehensive botanical reference covering prairie, woodland, wetland, savanna, and weedy wildflowers native to Illinois, complete with plant-feeding and flower-visiting insect databases. The site's depth is remarkable, extending beyond flora to include vertebrate animal interactions, botanical and ecological terminology, and detailed photo documentation built over nearly two decades.
https://astropix.com/
Jerry Lodriguss has spent nearly 50 years photographing the night sky, and AstroPix collects his expertise into a comprehensive resource covering everything from smartphone star trails to deep-sky nebulas and total solar eclipses. Visitors will find equipment reviews, image processing tutorials, observing guides, and stunning astrophotos of planets, comets, galaxies, and celestial events spanning decades of film and digital work.