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://ari.it/
The official portal of the Associazione Radioamatori Italiani (ARI), Italy's national amateur radio association affiliated with the IARU, serving hundreds of thousands of licensed operators across the country. Visitors can access QSL bureau services, HF and VHF/UHF activity bulletins, a radio licensing course, the organization's magazine RadioRivista, and news about DX expeditions and club events.
https://theastronomer.tripod.com/
Tammy Plotner's astronomy site is a sprawling personal observatory journal covering years of nightly observing reports, constellation starhop guides, solar and lunar photography, aurora sightings, and deep sky sketches. With content spanning from 2001 to 2007 and sections on Messier studies, planetary transits, and star parties across Ohio and beyond, this is a genuine labor of love for backyard astronomers.
https://assa.org.au/
The Astronomical Society of South Australia (ASSA) is an active community organization offering public and member viewing nights, monthly meetings, and astronomy resources for all skill levels. The site features a rich collection of guides covering astrophotography, comets, variable stars, Aboriginal astronomy, and solar system events, plus details on observing sites like Stockport Observatory.
http://aamerican.com/aclr
The Amateur Cross Link Repeater Club (ACLR) was a Chicago-area ham radio repeater club operating on 147.225MHz that disbanded in 1998 after internal disputes and equipment failures. The site serves as a historical archive of the club's activities, meetings, and Dayton hamfest adventures, maintained by trustees Gregory K9OY and Ann K9OYN.
https://supercontrol.de/cat/us/hamradio2002e.php
SuperControl is a CAT (Computer Aided Transceiver) software suite by DH1NGP, offering radio control programs for a range of Yaesu transceivers including the FT-847, FT-1000MP, FT-857, and FT-897. The site includes screenshots, feature lists, and downloads for each supported radio, along with photos from the Ham Radio 2002 exhibition where the software was demonstrated live.
https://qsl.net/sidxa
The Swan Island DX Association is an informal club of amateur radio operators in the Raleigh, North Carolina area united by the pursuit of DX contacts and QSL card collecting. The site includes meeting details, member photos spanning multiple years at local restaurants, links to DX bulletins, and a history of the CIA clandestine radio station on Swan Island that inspired the club's name.
https://electrochemeisbasics.blogspot.com/
Ivan Robayo's technical blog explores electrochemical systems through simulation and modeling, covering topics like cyclic voltammetry, biosensors, ohmic resistance, and the Belousov-Zhabotinsky reaction. Posts combine physical chemistry theory with computational tools like R, deSolve, and Shiny to make complex electrochemical concepts accessible and interactive.
https://www.qsl.net/g4prs
The Poole Radio Society (G4PRS) is a UK-based amateur radio club representing enthusiasts in the Poole area, hosted on the QSL.net network. The site serves as the club's online presence, likely featuring member information, club activities, and resources for local ham radio operators.
https://rochesterskies.org/
The Rochester Astronomy Club is a 501(c)(3) non-profit based in Rochester, Minnesota, offering public night sky viewing events, member resources, and a club forum for amateur astronomers. The site features observing reports, event calendars, member blogs covering topics like Titan shadow transits and comet sightings, and outreach activities at local community events.
http://panther-observatory.com/
Johannes Schedler's Panther Observatory showcases stunning astrophotography covering the moon, sun, planets, comets, deep sky objects, and constellations, including imaging results from a semi-professional remote observatory at CTIO in Chile. The site also invites visitors to stay at a guest house in Altaussee, Austria, offering dark skies and alpine observing facilities.