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://alpo-astronomy.org/
The Association of Lunar and Planetary Observers (ALPO) is a long-running scientific organization connecting amateur and professional astronomers who study the Solar System, with dedicated sections covering everything from Mercury and Venus to comets, meteors, and eclipses. Visitors can access the latest issue of their peer-reviewed journal 'The Strolling Astronomer,' join observing sections, and tap into decades of planetary observation data and community research.
http://bratsatv.org/
The Baltimore Radio Amateur Television Society (BRATS) is a non-profit amateur radio club based in Baltimore, Maryland, focused on ATV (amateur television) repeaters, emergency communications, and public service. The site features club news, meeting announcements, technical writeups on their ATV repeater revival project, and information on joining the organization.
http://smallwonderqrp.blogspot.com/
K.P.S. Kang's blog dedicated to QRP (low-power) radio building, featuring homebrew transceiver projects, circuit schematics, and PCB layouts for minimalist radio construction. Posts cover topics like speech processors, SSB transceivers, and the FIREO low-power transceiver design, making it a useful resource for amateur radio homebrewers.
http://www.actonastro.com/
ActonAstro is a hobbyist astronomy site built by a California stargazer who went from a beginner 60mm refractor to a full backyard observatory with a Celestron 9.25-inch scope. Visitors will find astrophotography galleries, equipment reviews, polar alignment guides, and personal weather station data, all rooted in a genuine passion for the night sky.
https://www.qsl.net/g7txq
The homepage for the Association of Norfolk RAYNET Groups, a UK-based amateur radio emergency communications network serving Norfolk. The site provides information about who they are, links to individual group websites, and resources pointing to other amateur radio sites.
https://observers.org/
The SF Bay Area Astronomy Connection (TAC) is an informal network for amateur astronomers across the greater San Francisco Bay Area, connecting observers without the formality of dues, officers, or bylaws. The site features an extensive list of observing sites throughout the region, curated observing lists, equipment guides, and resources for both beginners and seasoned stargazers.
https://ipac.caltech.edu/2mass/gallery/index.html
The 2MASS Atlas Image Gallery at IPAC (California Institute of Technology) showcases stunning false-color infrared composite images from the Two Micron All Sky Survey, covering everything from solar system objects and nebulae to galaxies and star clusters. Compiled from three infrared wavelength bands mapped to visible colors, this publicly released collection serves as both a scientific resource and a visually compelling window into the infrared universe.
https://mistal2.tripod.com/CAS
The Cumberland Astronomical Society is an amateur astronomy club based in Gallatin, Tennessee, dedicated to bringing astronomy to the general public. The club hosts monthly events at local schools, libraries, and parks, though this Tripod page now redirects visitors to their updated website at CumberlandAstronomicalSociety.org.
https://swling.com/blog
The SWLing Post is a richly detailed blog dedicated to shortwave listening, ham radio, DXing, and all things radio, run by Thomas and a community of contributors. Visitors will find equipment reviews, broadcast schedules, numbers station reports, SDR guides, and news spanning pirate radio to vintage receivers.
http://astrosurf.com/jordigallego
Jordi Gallego's deep sky astrophotography site showcases stunning images captured since 2008 from his private Fosca Nit Observatory in Àger, Spain, one of southern Europe's darkest sky locations. The site combines aesthetic long-integration imaging with technical depth, including full equipment and processing notes per image, plus a dedicated section for exoplanet transit photometry observations.