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://www.qsl.net/ema-arrl/clublist.html
A comprehensive directory of amateur radio clubs across Eastern Massachusetts, organized under the ARRL Eastern Massachusetts section. Visitors will find dozens of clubs listed by name with links, spanning general, repeater, packet, contest, school, and company club categories.
https://www.qsl.net/w2vtm
The Victor Amateur Radio Association (VARA), callsign W2VTM, is the employee ham radio club of L-3 Communications Systems East in Camden, NJ, with roots tracing back to the historic Radio Corporation of America (RCA). The site offers club history, hamfest schedules for the South Jersey/Philadelphia metro area, licensing resources, satellite tracking links, HF propagation guides, and a rich heritage connecting members across RCA, GE Aerospace, Martin Marietta, Lockheed Martin, and L-3.
http://stargazing.net/mas
The Muskegon Astronomical Society is a Michigan-based non-profit astronomy club founded in 1972, with its own multi-building observatory complex and an active membership of stargazers. The site features astrophotography from members including nebulae, auroras, comets, and Saturn, plus comet ephemeris tools, observing links, a club events calendar, and JavaScripts for night sky calculations.
https://soho.nascom.nasa.gov/data/realtime/realtime-update.html
NASA's SOHO (Solar and Heliospheric Observatory) mission serves up the very latest real-time solar images captured by instruments including EIT, LASCO, and SDO/HMI, updated continuously from the spacecraft. Visitors can explore the sun in multiple wavelengths and coronagraph views, making this an invaluable resource for solar observers, space weather enthusiasts, and researchers alike.
https://qsl.net/vqs
The Virginia QRP Society (W4VQS) is a free amateur radio club focused on QRP low-power operation, welcoming members without any membership fees. Maintained by webmaster Jeff (K4JTN), the site offers club information and links for Virginia-area ham radio enthusiasts interested in low-power communications.
https://vkham.com/
VKHam is a comprehensive Australian amateur radio resource hub run by VK2CA, featuring over 12,000 QSL card images, a directory of 1800+ VK callsigns, repeater maps for all Australian states, and DX information. The site also offers kit and radio manuals, electronics resources, frequency tables, and a classifieds section specifically for the Australian ham radio community.
http://atm-workshop.com/
John D. Upton's comprehensive resource for amateur telescope makers (ATMs) covers tips, techniques, and projects spanning optics grinding, metalworking, woodworking, electronics, and astrophotography. Built over two decades of hands-on experience, the site documents the rewarding crossover hobby of crafting your own telescopes and specialized astronomy accessories from scratch.
https://qsl.net/n1otx
Paul's N1OTX homepage is a weather-obsessed amateur radio operator's corner of the web, featuring a real-time home weather station for Brockton, MA, Java-based weather casts, and wind chill calculators comparing old and new NWS formulas. Beyond the weather tools, the site also dives into packet radio with a local BROCK node, and offers curated links for amateur radio clubs, ARES/RACES, and general computing resources.
http://users.marktwain.net/aschmitz/home.html
KB0YKI's Radio Zone is Aaron Schmitz's amateur radio resource featuring antenna building hints, gamma match plans, repeater building guides, and online tools like a Yagi designer and J-Pole designer. The site also includes a QSL card maker, regional scanner frequencies, and a repeater map, making it a handy reference for ham radio hobbyists.
http://worldclimate.com/
WorldClimate.com is a comprehensive database of historical weather averages for over 85,000 locations worldwide, offering rainfall, temperature, and precipitation records spanning decades. Travelers, researchers, and curious minds can look up climate normals for cities from Bangkok to Lima, making it a handy reference for trip planning, relocation decisions, or general weather curiosity.