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://qsl.net/kc4gzx/kc4gzx/project.htm
KC4GZX is a sprawling amateur radio and electronics resource by a Georgia ham operator, featuring over 2100 DIY homebrew projects spanning antennas, amplifiers, transmitters, microcontrollers, lasers, and more. It also includes a Northeast Georgia ham directory, repeater listings across multiple southeastern states, and a hamfest schedule, making it an invaluable hub for regional and hobbyist radio enthusiasts.
https://w9cva.org/
The Chippewa Valley Amateur Radio Club (CVARC) is a Wisconsin-based ham radio club offering licensing classes, repeater networks, hamfests, and member resources for both newcomers and seasoned operators. The site features club news, ongoing projects like a remote SDR receiver and a permanent club station, equipment sales, and links to their extensive repeater infrastructure across the region.
https://oklo.org/
Oklo, written by Greg, is a long-running science blog that explores astrophysics, cosmology, and cutting-edge topics like interstellar objects, exoplanets, and the physics of computation. Posts blend deep technical thinking with wide-ranging curiosity, touching on thermodynamics, AI, and space science in a way that rewards careful reading.
https://qsl.net/sv2ael/greekhamail.htm
Created by Greek amateur radio operator SV2AEL, this page is a comprehensive alphabetical directory of over 580 email addresses for licensed ham radio operators across Greece, organized by callsign prefix. A unique and practical reference for the Greek ham radio community, it covers all SV, SW, SX, and SZ callsign districts and is maintained as a personal initiative by Savas Pavlidis.
https://caacwv.com/
The Central Appalachian Astronomy Club is a 501(c)(3) non-profit based in West Virginia dedicated to promoting amateur astronomy and partnering with local schools and universities. Visitors can learn about the club's 20-foot Ash Dome observatory housing a 16-inch Meade LX200 telescope, upcoming meetings and events, and how to join.
https://n4gn.com/sr
Tim Totten (N4GN) built this dedicated archive for the 1997 BS7H amateur radio DXpedition to Scarborough Reef, one of the rarest DXCC entities in the world. Visitors can search the expedition's QSO log, review operating frequencies and bulletins, meet the operating team, and explore QSL card information from this historic contact event.
http://stargazing.net/david/constel/skymapindex.html
David Haworth's stargazing site offers a comprehensive index of printable sky maps organized by month, time, and observing location, with five detail levels ranging from basic star fields to full constellation boundaries. Each map links to more detailed constellation charts, making this a practical reference for amateur astronomers heading out for a night of naked-eye or telescopic observing.
http://choisser.com/packet
Larry Kenney (WB9LOZ) presents an 18-part introductory series on packet radio, originally written in 1988 for the San Francisco Amateur Radio Club newsletter and revised multiple times through the 1990s. The series covers everything from basic concepts and TNC commands to BBS usage, node networks, and the National Traffic System, making it a comprehensive self-study guide for amateur radio operators interested in packet operations.
http://catawbasky.org/
The Catawba Valley Astronomy Club (CVAC) has been bringing amateur astronomy to North Carolina's Catawba Valley for 50 years, operating the Lucile Miller Observatory and hosting public stargazing events at parks, schools, and local venues. The site serves as the club's hub for event schedules, membership applications, officer listings, and clear sky charts for observers in the region.
http://mesoscale.ws/
Eric Nguyen's personal meteorology site documents his storm chasing experiences, tornado photography, and forecasting work as a University of Oklahoma School of Meteorology graduate. The site features storm documentation reports, dramatic weather photography including tornadic supercells, and serves as a lasting tribute to Eric, who passed away in 2007.