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://kstrom.net/isk/stars/starmenu.html
Created by Paula Giese, this richly detailed site explores Native American and Aboriginal astronomy, covering Lakota star knowledge, sacred star maps, medicine wheels as solar-stellar observatories, and indigenous constellation traditions. It serves as an educational hub with links to Lakota theology, archaeoastronomy, star stories, and teacher resources for native-centered science curricula.
http://www1.phys.vt.edu/~jhs/astroclb/index2.html
The Astronomy Club of Virginia Tech hosts this homepage for students and enthusiasts interested in stargazing, telescope use, and observing events at the Prices Fork Observatory. Visitors will find meeting schedules, officer contacts, club photos, and a curated set of observing tools including Messier maps and monthly sky charts.
https://www.qsl.net/n5tle
Kelly Kohls (N5TLE) shares his amateur radio interests alongside a collection of DMX512 electronics projects built around the PIC16F876 microcontroller, including source code, hex files, schematics, and functional descriptions. The site is a practical resource for anyone interested in DMX512 lighting control interfacing with analog voltage converters using PIC microcontrollers.
http://smartsonline.org/
SMARTS is the Southwest Metro Amateur Radio Transmitting Society, a ham radio club serving members who are licensed or pursuing their FCC Part 97 amateur radio license. The club hosts weekly nets on the WB0RMK repeater, monthly meetings, and community breakfasts, making it a welcoming hub for both new and experienced ham radio operators.
https://astronomyclub.org/share/links.htm
A curated links directory from an astronomy club, organizing resources into categories covering amateur astronomy groups across the southern US, national organizations, NASA resources, observatories, and telescoping guides. It serves as a handy launchpad for stargazers at any level, connecting visitors to everything from local star parties to Hubble gallery images.
https://contesting.com/
Contesting Online is a hub for amateur radio operators passionate about radio sport and contesting, offering news, articles, contest schedules, mailing list archives, and product reviews. Part of the eHam.net network, it brings together a community of contesters with resources like the Contester Lookup, classified ads, and links to major contest logging software mailing lists.
http://sm0vpo.altervista.org/
Harry Lythall (SM0VPO/G4VVJ) shares an extensive collection of homebrew amateur radio construction projects, covering everything from QRP transmitters and receivers to circuit boards, oscillators, and RF amplifiers. The site is a treasure trove for hands-on ham radio enthusiasts, packed with schematics, datasheets, calculators, and practical guides for building your own radio equipment.
https://mathcs.clarku.edu/%7Edjoyce/hilbert/toc.html
Created by David E. Joyce of Clark University, this site presents the full text of David Hilbert's famous 1900 lecture outlining 23 unsolved mathematical problems that shaped 20th-century mathematics. Each problem links to its own dedicated page with references to key solutions and related works, making it an invaluable reference for anyone studying the history and foundations of mathematics.
https://nic.funet.fi/pub/astro/html/astro-uk.html
Hosted on the Finnish University and Research Network (FUNET), this is the national homepage for amateur astronomy in Finland, maintained by members of the Ursa Astronomical Association. It organizes links to Finnish astronomical clubs, research institutions, schools, planetaria, publications, and observation resources, reflecting a country with one of the highest per-capita rates of amateur astronomers in the world.
https://johnefarley.com/wx.htm
John E. Farley has been chasing and documenting severe weather across the Midwest, Plains, and West since 1996, with detailed field reports spanning nearly three decades. The site features storm observation logs organized by year, photo galleries of tornadoes, supercells, lightning, and other phenomena, plus a thoughtful essay on safe storm chasing practices.