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://themineralgallery.com/
The Mineral Gallery is a comprehensive online reference dedicated to minerals, featuring detailed descriptions, chemical formulas, physical properties, and photographs of hundreds of mineral specimens. It serves as an invaluable resource for collectors, geology students, and enthusiasts seeking in-depth information on everything from common quartz varieties to rare sulfosalts.
http://normsrotorservice.com/
Norm's Rotor Service is the oldest and largest antenna rotator repair facility in the United States, specializing in sales, service, and parts for ham radio antenna rotators since the 1960s. With an inventory of over 25,000 parts covering brands like Cornell-Dubilier, Hy-Gain, and Telex, this is an essential resource for amateur radio operators needing rotor repairs or replacements.
https://radiojove.gsfc.nasa.gov/
NASA's Radio JOVE Project invites students, educators, and citizen scientists to observe and study solar and planetary radio emissions using affordable dipole antenna telescope kits they build themselves. The site offers detailed guides for constructing radio telescopes, downloadable spectrograph software, a data archive, educational materials, and a community map of active Radio JOVE teams around the world.
https://fcrosby.com/ears
A historical archive of the Englewood Amateur Radio Society, preserving records and activities from 1999 to 2017. The site serves as a digital repository for this local ham radio club's legacy, offering a rare glimpse into nearly two decades of amateur radio community organizing.
https://lavcastrogroup.org/planetariumshowsched.htm
The LAVC Astronomy Group's planetarium schedule page lists public show dates for Spring 2020, covering topics like the search for extraterrestrial life, black holes, and spring constellations. Each event is held at the campus observatory and includes telescope viewing through a Celestron 16-inch instrument after the show, making it a hands-on community astronomy experience.
https://n3yrw.tripod.com/index-3.html
Frank N3YRW's ham radio link collection is a curated gateway to the world of amateur radio, covering DX hunting, callsign lookups, equipment dealers, antennas, and upcoming DXpeditions. Packed with dozens of links to resources like QRZ, ARRL, Icom, Yaesu, and DX clusters, this page is a handy one-stop reference for hams of all experience levels.
http://donklipstein.com/
Don Klipstein's sprawling technical resource covers everything from LEDs and fluorescent lamps to Tesla coils, xenon strobes, lasers, and high voltage experiments. With decades of accumulated hobbyist knowledge, detailed guides, and regularly updated content, it's an indispensable reference for electronics enthusiasts interested in lighting and discharge lamp technology.
http://para.buxcom.net/
The Philadelphia Area Repeater Association (PARA) maintains this club site listing their extensive network of repeaters across the greater Philadelphia region, including Valley Forge, Camden, and surrounding areas. Visitors can find club history dating back to 1971, officer listings, membership info, and links to ARRL and FCC resources for ham radio operators.
https://clavius.org/
Moon Base Clavius is a thorough, well-organized resource dedicated to debunking Apollo moon landing conspiracy theories, drawing on contributions from both amateurs and professionals. Visitors will find detailed analyses of Apollo photographs, environmental conditions, technology, space vehicles, and the logical fallacies underpinning hoax claims.
https://qsl.net/w3mrc
The W3MRC Amateur Radio Club is a ham radio organization based in Austin, Texas, with a web presence on the QSL.net network. The site serves as a basic landing page for the club, last updated in 2013, offering a starting point for local amateur radio enthusiasts in the Austin area.