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://ned.ipac.caltech.edu/help/cosmology_calc.html
Hosted by NASA's Extragalactic Database (NED) at Caltech, this curated page collects links to online cosmology calculators contributed by researchers at UCLA, University of Colorado, and other institutions. Visitors can compute distances, lookback times, Hubble parameters, K-corrections, and other key cosmological quantities by entering values like redshift, Hubble constant, and Omega parameters.
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://scottaaronson.blog/
Shtetl-Optimized is the long-running blog of Scott Aaronson, a theoretical computer scientist and quantum computing researcher, where he dives deep into complexity theory, quantum computing misconceptions, AI, and education policy. Known for its intellectual rigor and wit, it attracts readers from academia and beyond who enjoy substantive takes on math, physics, and the occasional culture-war skirmish in gifted education.
https://arpgalaxy.com/
A comprehensive amateur astronomy resource dedicated to Halton C. Arp's Atlas of Peculiar Galaxies, cataloging all 338 peculiar and interacting galaxy entries with supporting data, imagery, and observing guidance. Built by and for amateur observers, the site bridges professional archival photography from the Palomar 200-inch telescope with modern amateur CCD imaging to show that anyone with a backyard telescope can observe these remarkable objects.
https://qsl.net/wmars
The West Marin Amateur Radio Society (WMARS) is a California ham radio club dedicated to fostering the hobby in western Marin County, with a notable public service mission to preserve the historic Marconi Conference Center, the site of Guglielmo Marconi's west coast radio operations from the early 1900s. The site includes membership info, a calendar of events, 1999 Field Day plans, and details on obtaining a commemorative QSL card from special event operations at the historic site.
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.
http://oscarmn.org/
The Owatonna Steele County Amateur Radio club (OSCAR) serves ham radio enthusiasts in Owatonna, Minnesota, with resources including repeater info, EchoLink access, a club store, and emergency service coordination. The site lists club officers, monthly meeting details, licensing classes, and links to ARRL, SKYWARN, and local emergency management organizations.
http://ccas.us/
The Chester County Astronomical Society (CCAS) is a Pennsylvania-based non-profit bringing together amateur astronomers through monthly meetings, observing sessions, and public star parties for schools and civic groups. The site features an events calendar, member photography, planetarium show schedules at West Chester University, and resources for anyone interested in exploring the night sky.
http://ka6wke.blogspot.com/
Mark Schoonover (KA6WKE) shares his amateur radio experiences, including homebrew antenna tuner builds, HF mobile setups, and equipment reviews for his IC-7000 and IC-706MKIIg rigs. The site features hands-on technical posts about Z-match tuners, horizontal loops, and ladder line feeding, making it a useful read for hams interested in practical antenna projects.
https://semara.org/
SEMARA is the Southeastern Massachusetts Amateur Radio Association, a club based in New England that hosts repeaters, VE licensing exam sessions, regular on-air nets, and social gatherings for ham radio enthusiasts. The site includes a member roster, club newsletter archive, scholarship announcements, and live repeater audio streaming at 147.000 MHz.