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://astunit.com/astunit_tutorial.php?topic=glossary
The Astronomical Unit is a comprehensive astronomy tutorial site covering everything from choosing a first telescope to positional astronomy, stellar evolution, and debunking pseudoastronomy claims. Visitors will find practical guides, a detailed glossary, book recommendations, DIY telescope projects, and rigorous critiques of popular astronomical myths like the '2012 nonsense' and Apollo conspiracy theories.
https://pfaf.org/user/Default.aspx
Plants For A Future (PFAF) is a searchable database of over 8,000 plants catalogued by their edible, medicinal, and other practical uses, making it an essential reference for permaculture enthusiasts and herbalists alike. The site covers topics ranging from food forests and carbon farming to rare and unusual perennial plants, with browsable indexes and habitat guides built up over decades by a UK-registered charity.
https://www.qsl.net/ciarc
The Christians of Idaho Amateur Radio Club (CIARC) is a faith-based ham radio organization that monitors multiple simplex frequencies and aims to spread the Christian faith through amateur radio. Designed by Darin Roberts in 2006, this club site serves as a hub for members who combine their passion for radio communication with their religious mission.
http://starshadows.com/
Star Shadows Remote Observatory (SSRO) was a cooperative astro-imaging venture cofounded by Rick Gilbert, Jack Harvey, Steve Mandel, and John Pierce, producing deep-sky images from New Mexico and Cerro Tololo Inter-American Observatory in Chile from 2004 to 2018. The archived site offers access to their gallery, equipment details, and documents from over a decade of collaborative astrophotography.
https://mistal2.tripod.com/CAS
The Cumberland Astronomical Society is an amateur astronomy club based in Gallatin, Tennessee, dedicated to bringing astronomy to the general public. The club hosts monthly events at local schools, libraries, and parks, though this Tripod page now redirects visitors to their updated website at CumberlandAstronomicalSociety.org.
http://mistisoftware.com/astronomy/index.htm
Misti Mountain Observatory is an amateur astronomy site featuring stunning astrophotography captured with a 32-inch Ritchey-Chretien telescope in Arizona, covering galaxies, nebulae, star clusters, and solar system objects. The site includes detailed equipment notes, film and CCD imaging data, conference listings, and even a specialized app that lets blind and visually impaired users explore astronomical images through musical tones.
https://secure1.ed.brocku.ca/~rahul/Misc/pi.html
A page by a student or researcher at Brock University presenting the first 10,000 decimal digits of pi, calculated using Machin's formula on a Silicon Graphics MIPS R4400 workstation. It offers a concise glimpse into early 1990s academic computing power applied to a classic mathematical challenge.
http://kc7nod.20m.com/index.htm
CW's radio page is a hobbyist resource dedicated to shortwave listening, featuring DIY projects and guides for devices like random wire antennas, static discharge units, ferrite couplers, and attenuators. The site offers practical technical content for SWL enthusiasts, including modification guides for receivers like the DX 390 and transformer builds.
https://qsl.net/n2jac/jota99/jota99.html
N2JAC documents their participation in Jamboree On The Air (JOTA) 1999, an annual event where Scouts around the world connect via amateur radio, held at Webster Park in Webster, New York. The page is a photo gallery featuring fellow operators like John W3OAB and Irv AF2K, offering a snapshot of grassroots ham radio community events from the late 1990s.
https://bcbirdalert.blogspot.com/
BC Rare Bird Alert is a community birding blog tracking rare and unusual bird sightings across British Columbia, Canada, with detailed location reports, maps, and observer notes. Each post documents a specific rare species encounter, making it an invaluable real-time resource for birdwatchers and ornithology enthusiasts in the Pacific Northwest.