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://n4gn.com/sr
Tim Totten (N4GN) built this dedicated archive for the 1997 BS7H amateur radio DXpedition to Scarborough Reef, one of the rarest DXCC entities in the world. Visitors can search the expedition's QSO log, review operating frequencies and bulletins, meet the operating team, and explore QSL card information from this historic contact event.
https://wz5bbs.com/radio
WZ5BBS is the amateur radio station page of an Amateur Extra class licensee, cataloging an impressive shack setup including Icom, Kenwood, and Yaesu radios alongside Diamond and Chameleon antennas. The site tracks APRS iGate activity, multiple logbooks like POTA and Logbook of the World, fox hunting events, and club memberships with the Oak Hill and Austin Amateur Radio clubs.
https://up-ship.com/Book/spaceshipdesign.htm
A work-in-progress book project aimed at giving science fiction authors and scriptwriters the real engineering and physics knowledge needed to design plausible spacecraft. The site outlines chapter topics ranging from propulsion systems and structures to weapons and re-entry, covering everything from chemical rockets to theoretical Alcubierre warp drives.
https://electronics-notes.com/
Electronics Notes, created and maintained by engineer Ian Poole, is a comprehensive reference hub covering electronics theory, circuit design, components, radio technology, antennas, ham radio, and more. With tutorials aimed at everyone from hobbyists to professionals, it also offers downloadable guides, infographics, and component data sheets, making it a genuinely useful destination for anyone working with electronics.
http://bitxhacks.blogspot.com/
BITX Hacks is a technical blog by Pete N6QW dedicated to modifications, hacks, and experiments with the BITX40 and uBitx transceiver boards. Posts cover hands-on hardware tweaks like display upgrades, inline fuse wiring, and external linear amplifier controls, making it a practical resource for amateur radio homebrewers.
https://qsl.net/a/aa6j//radiomb
Created by AA6J Bill Jeffrey, an Assistant Scoutmaster and Merit Badge Counselor from San Diego, this site provides study notes and guidance to help Boy Scouts earn the Radio Merit Badge without needing a ham license or Morse code knowledge. It covers all eight requirements for the badge and includes links to additional resources, updated for the 2002 BSA requirements.
https://exoplanet.eu/home
The Encyclopaedia of Exoplanetary Systems, maintained by a dedicated research team since 1995, catalogs over 8,000 confirmed extrasolar objects with filtering, sorting, and export tools for professional and amateur astronomers alike. Visitors can explore databases on binary star systems and circumstellar disks, generate online plots, view planetary systems in 3D and even virtual reality, and browse an exhaustive bibliography of exoplanet discoveries.
https://mdgeosociety.org/
The Maryland Geological Society is a non-profit club founded in 1991 for amateur and professional fossil and mineral collectors, open to all who share a passion for the geological sciences. Visitors will find meeting schedules, field trip announcements, fossil and mineral FAQs, a gallery, newsletter archives, and articles by contributing scientists.
http://greencountryhamfest.org/
Green Country Hamfest, Inc. organizes the annual amateur radio hamfest held at the Claremore Expo Center in Claremore, Oklahoma. The site provides information about this West Gulf Division event, serving ham radio enthusiasts from the region.
https://enchantedlearning.com/subjects/astronomy/glossary/index.shtml
Zoom Astronomy from EnchantedLearning.com is a comprehensive astronomy glossary and educational reference covering terms from A to Z, with illustrated definitions of concepts like aberration of light, aphelion, asteroids, and more. Aimed at K-12 students and teachers, the site includes printables, worksheets, and detailed pages on the solar system, stars, comets, and notable astronomers.