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://thearac.org/
The Arrowhead Radio Amateurs Club (ARAC, W0GKP) is one of the oldest ham radio clubs in the region, founded in 1929 to promote amateur radio in northeastern Minnesota and northwestern Wisconsin. The site offers club meeting details, repeater information, Skywarn weather monitoring links, education and testing session resources, and membership information for the Duluth-Superior Twinports area.
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://spacewatch.lpl.arizona.edu/fmo-project/overview
The SPACEWATCH® FMO Project, run by the University of Arizona's Lunar and Planetary Laboratory, documents the detection of Fast Moving Objects, which are near-Earth asteroids passing so close that they appear as light trails in telescope imagery. The site explains the science behind close-approach asteroid detection, shares discovery images, and describes the citizen participation program that once helped identify faint FMOs.
http://ccs.neu.edu/home/amislove/twittermood
Researchers at Northeastern and Harvard University mapped U.S. emotional mood patterns across time and geography using over 300 million tweets from 2006 to 2009. The project features time-lapse video visualizations, density-preserving cartograms, and findings on daily and weekly mood cycles across the country.
https://metrocor.net/
MetroCor is the Metropolitan Coordination organization for amateur radio repeaters covering New York City, New Jersey, and surrounding counties, maintaining an extensive database of coordinated frequencies across bands from 10 meters through 23 centimeters. The site publishes detailed repeater coordination tables listing hundreds of callsigns, output and input frequencies, PL tones, and coordination status for the greater NYC metro area.
http://web.mit.edu/redingtn/www/netadv/welcome.html
Created by Norman Hugh Redington at MIT, The Net Advance of Physics is an encyclopedic collection of review articles and tutorials covering the full breadth of physics, organized alphabetically and continuously updated since 1995. Special features include a 19th century physics retro archive, history of science resources, a science poetry collection, and curated links to recent controversies in the field.
https://rckara.org/
The RCKARA (likely Reno County Kansas Amateur Radio Association) maintains this site as a hub for their amateur radio club, featuring meeting minutes, hamfest announcements, and member activities. Visitors will find detailed records of club business including repeater trustee reports, WSPR balloon tracker experiments, and links to ARRL News and NOAA Space Weather.
http://vk2zay.net/
Alan Yates (VK2ZAY) runs a sprawling electronics and amateur radio laboratory notebook covering homebrew circuits, microcontrollers, high voltage experiments, pyrotechnics, antennas, and much more. With over 260 articles, engineering calculators, and an annual Advent Calendar of Circuits series, this is a genuine treasure trove for hands-on electronics hobbyists.
https://www.vkham.com/
VKHam is a comprehensive Australian amateur radio resource hub run by VK2CA, featuring over 12,000 QSL card images, a directory of 1800+ VK callsigns, repeater maps for all Australian states, and an extensive electronics and kit manual library. Visitors can look up VK callsigns, browse DX information, access frequency and Morse code references, and even post classified ads for ham radio equipment.
https://lostartoflogarithms.com/
Charles Petzold's web-book-in-progress explores the history, utility, and mechanics of logarithms, from their origins in 400-year-old mathematical tables to slide rules and spherical trigonometry. With over 30 chapter-length pages covering topics like the Book of Vlacq, log-log scales, and John Napier's life, this is a rich and deeply researched labor of love for math history enthusiasts.