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://rivastro.org/index.php
The Riverside Astronomical Society (RAS) has been serving Southern California astronomy enthusiasts since 1957, offering star parties, public outreach, monthly meetings with professional astronomers, and access to their dark sky site GMARS in Landers, CA. The site features event calendars, member resources, sky cameras, weather data, and information about their annual Nightfall star party event.
http://eveandersson.com/pi
Pi Land is Eve Andersson's comprehensive tribute to the mathematical constant pi, featuring trivia games, a memory trainer, digit search tools, frequency analysis, and multiple calculation methods including Gregory-Leibniz and Monte Carlo. The site blends nerdy exploration with aesthetic touches like poetry, photos, and art, making it a delightful destination for math enthusiasts of all levels.
http://azastronomy.com/
Richard D. Jacobs, M.D. shares his CCD astrophotography captured from his backyard in Chandler, Arizona, showcasing diffuse nebulae, galaxies, star clusters, planetary nebulae, and solar system objects despite significant light pollution. The site also covers the technical side of amateur CCD imaging including astrometry, spectroscopy, and photometry, making it a useful resource for urban amateur astronomers.
https://daviddarling.info/encyclopedia/A/40_Eridani.html
David Darling's encyclopedia entry on 40 Eridani covers the nearby trinary star system in Eridanus, including its white dwarf, red dwarf, and orange main-sequence components, with detailed discussion of habitability and its famous role as Vulcan's star in Star Trek. Part of a broader astronomy encyclopedia, this page blends rigorous stellar data with engaging science fiction connections, complete with NASA imagery and comparisons to our own solar system's habitable zone.
https://kc1xx.com/
KC1XX is the site for a competitive amateur radio station, featuring details about the station setup, antenna systems, and the team behind the operation. Visitors can browse the station gallery, search logs, and request QSL cards, with a bonus section covering the HJ4XX DX expedition.
http://freidaybird.blogspot.com/
Don Freiday's nature blog blends wildlife photography, birding observations, and philosophical reflections from the Pine Barrens of New Jersey and beyond. With over 3,000 posts and a career spanning competitive birding events across Texas, Israel, and the U.S., Freiday brings genuine expertise and a naturalist's eye to every entry.
http://allthesky.com/
Created by Till Credner and Sven Kohle, AllTheSky.com is a stunning astrophotography gallery spanning comets, nebulae, galaxies, constellations, aurora borealis, and atmospheric phenomena. The site offers an impressive breadth of celestial imagery including nightscapes, 360-degree views, live all-sky feeds, and articles that make it a rich destination for astronomy enthusiasts.
http://n5hq.com/
N5HQ is the personal ham radio site of an Extra Class operator licensed since 1978, covering SSTV, DSSTV, QSL cards, antenna design tools, and amateur radio licensing resources. The site also highlights the operator's involvement as an ARRL Volunteer Examiner, Skywarn weather spotter, and Ten-Ten International member.
https://solarviews.com/eng/mars.htm
Calvin J. Hamilton's comprehensive Mars reference page covers everything from the planet's geology and atmosphere to its moons, polar regions, and exploration missions like Viking, Pathfinder, and the Mars Rovers. Packed with images, animations, 3D galleries, and scientific articles, it serves as a deep-dive educational hub for anyone fascinated by the Red Planet.
https://qsl.net/ct1nmv
The Radio Scouting Department (Departamento de Rádio Escutismo) of the Moinhos de Vento Scout Group in Portugal claims to be the first Portuguese page dedicated to radio scouting, covering Jamboree-on-the-Air (JOTA), JOTI, QSL galleries, frequencies, repeaters, and amateur radio specialties for scouts. With dozens of sections including DXCC, IOTA, telegraphy, scout call books, and historical records, this is a rich resource for the intersection of amateur radio and the scouting movement.