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://icstars.com/HTML/SolarSection/HAlpha/OBSERVINGTHESUNHAlpha1.html
David Knisely's comprehensive H-Alpha handbook covers solar observation in remarkable technical depth, with dedicated sections on prominences, sunspot group classification, solar flares, and a full glossary of H-Alpha terminology. Part of the larger ICSTARS Astronomy site, this resource is a serious reference for amateur astronomers interested in observing the sun through hydrogen-alpha solar filters.
https://moonblink.info/Eclipse
Hermit Eclipse, created by Ian Cameron Smith, is a comprehensive reference site dedicated to solar and lunar eclipses, featuring searchable catalogs, prediction data, observing guides, and eclipse science explanations. Built on the legendary data of Fred Espenak (NASA's Mr. Eclipse), it covers upcoming eclipses worldwide with regional visibility guides, eye safety tips, and a full historical eclipse database.
http://dimensions-math.org/Dim_E.htm
Dimensions is a freely available two-hour mathematical film by Jos Leys, Étienne Ghys, and Aurélien Alvarez that guides viewers through nine chapters building up to the concept of the fourth dimension. Released under a Creative Commons license, it offers commentary and subtitles in over a dozen languages, making advanced mathematical visualization accessible to a global audience.
https://observing.skyhound.com/
Observing at Skyhound is a long-running amateur astronomy resource from the creator of SkyTools 3, offering deep sky observing guides, comet chasing updates, monthly observing information, and a growing handbook of articles. Dating back to 1999, the site blends personal observing experience with practical tools and links for serious amateur astronomers.
https://sprott.physics.wisc.edu/pickover/home.htm
The personal homepage of prolific author and inventor Clifford A. Pickover, featuring links to his 50+ books spanning fractals, chaos, black holes, the fourth dimension, and the mathematics of reality. With 800 patents, a sprawling collection of puzzles, art, and cosmic questions, this site is a portal into the mind of one of science's most imaginative popularizers.
https://austinvernon.site/
Austin Vernon's blog tackles ambitious topics at the intersection of energy, technology, and industry, with posts exploring geothermal power, nuclear regulation, solar storage, AI logistics, and reindustrialization strategy. The writing is analytical and forward-looking, making it a compelling read for anyone interested in how emerging technologies and business models might reshape the global economy.
https://spaceprojects.com/NASA
NASAWatch.INFO is an independent, sponsor-free watchdog site that critically examines NASA's bureaucracy, spending, and policies, advocating for commercial spaceflight and government reform. Visitors will find curated links, news articles, congressional bills, scandal coverage, and commentary pushing for a privatized, democratically accountable space program.
http://amasci.com/amateur/elehob.html
Bill Beaty's Electronics Hobbyist page is a sprawling directory of resources for electronics enthusiasts, covering surplus suppliers, schematics archives, robotics, embedded processors, Tesla coils, and electrostatics projects. It also includes Bill's own articles on electricity fundamentals, common misconceptions, and hands-on science experiments, making it a rich hub for both beginners and seasoned hobbyists.
https://circuitsarchive.org/
CircuitsArchive is a free, web-based archive of electronic circuit schematics covering everything from audio gear and battery monitors to filters, telephone interfaces, and microprocessor circuits. Maintained by Nicola Asuni since 1998, it offers a well-organized collection of PCB designs and projects useful to hobbyists and engineers alike.
http://astrosurf.com/cidadao
António Cidadão's dedicated astronomy site showcases years of lunar and planetary observation from Carcavelos, Portugal, featuring CCD imaging of the Moon, Mars, Jupiter, and Saturn captured with a 14-inch SCT telescope. The site includes detailed imaging guides covering super-resolution techniques, tri-colour imaging, limb darkening correction, time-lapse animations, and a Moon-Light Atlas reference, making it a rich resource for amateur planetary imagers.