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://qrparci.org/
QRP ARCI is the QRP Amateur Radio Club International, a 16,000-member organization dedicated to low-power ham radio operating and homebrewing. The site hosts contest schedules, a Hall of Fame, links to kits and supplies, and the full contents of their quarterly magazine featuring technical articles by prominent QRP operators.
http://sprg.ssl.berkeley.edu/shine/suntoday.html
Hosted at UC Berkeley's Space Sciences Laboratory, this page aggregates the latest solar images and interplanetary data from observatories and missions worldwide, including SOHO, STEREO, SDO, Big Bear, and Mauna Loa. Researchers and solar enthusiasts can browse visible light, H-alpha, extreme ultraviolet, X-ray, and magnetogram imagery alongside real-time solar wind and particle data from ACE and WIND spacecraft.
https://fourmilab.ch/solar/solar.html
Solar System Live is an interactive web orrery created by John Walker that lets visitors visualize the entire solar system or inner planets at any date, time, and viewpoint they choose. Users can track asteroids and comets using orbital elements, generate custom star maps, and save personalized configurations as bookmarks, making it a genuinely useful tool for amateur and serious astronomers alike.
https://www.qsl.net/w1ee
John Sabini (WB1GRB) runs this personal ham radio page from Stamford, Connecticut, sharing his Advanced Amateur Radio License activities including repeater frequencies, simplex phone patch info, and New England frequency listings. A snapshot of early 2000s amateur radio culture in southwestern Connecticut, the site also links to local emergency communications groups like WECA and GNARC Norwalk.
http://astronomy.net/
Astronomy.Net is a comprehensive hub for amateur and professional astronomers alike, offering articles, forums, constellation guides, sky event calendars, and equipment classifieds all in one place. Built and maintained by John Huggins since 1994, the site covers everything from telescope optics and astrophotography to meteor showers and planetary conjunctions.
https://cobaltpet.blogspot.com/
Run by a Northern California hobbyist known as 'weatherall', this blog chronicles shortwave and mediumwave radio listening with detailed reception reports, SIO signal quality codes, station identifications, and portable receiver reviews. Covering international broadcasters, number stations, utility signals, NDB logs, and DXing tips, it's a thorough record of the hobby for fellow shortwave enthusiasts.
https://radiojove.gsfc.nasa.gov/
NASA's Radio JOVE Project invites students, educators, and citizen scientists to observe and study solar and planetary radio emissions using affordable dipole antenna telescope kits they build themselves. The site offers detailed guides for constructing radio telescopes, downloadable spectrograph software, a data archive, educational materials, and a community map of active Radio JOVE teams around the world.
http://celestrak.org/
CelesTrak, maintained by T.S. Kelso, is a premier resource for satellite tracking data including NORAD GP element sets, two-line element (TLE) files, and orbital environment tools used by the global space community. Now operating as a 501(c)(3) non-profit, it offers visualization tools, SOCRATES conjunction analysis, documentation, and special event coverage including debris events and rocket body reentries.
https://astronomy-links.net/twocomets.html
Clark M. Thomas offers a detailed analysis of comet imaging techniques, comparing amateur astrophotographer Damian Peach's stunning wide-field ISON image against the professional Subaru telescope's shot of Comet Lovejoy. The article makes a compelling case for tracking background stars rather than the comet itself, arguing that the resulting sharp stellar fields and visible deep-sky objects produce the most visually rewarding comet photographs.
http://milueth.de/Moose
Michael Lueth's extensive photographic flora documents mosses, liverworts, and other bryophytes across Europe and beyond, with photo diaries from dozens of field excursions spanning from Svalbard to Madeira. The site features hundreds of species-level plant photographs organized by location and expedition, making it a remarkable visual reference for bryophyte enthusiasts and botanists alike.