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://gazers.org/
The Penobscot Valley Star Gazers (PVSG) is a Maine-based astronomy club hosting monthly meetings both in-person at John Bapst High School in Bangor and via Zoom. The site offers a calendar of upcoming events, a gallery, an archive, and real-time comet tracking resources for members and stargazing enthusiasts in the region.
https://aa9pw.com/
AA9PW.com is an amateur radio practice site built by operator AA9PW to help aspiring hams pass their FCC license exams and learn Morse code. It features customizable online practice tests, a Morse code generator, and a companion iPhone app called Ham Morse for on-the-go CW practice.
http://nu5de.org/
The Naturist Amateur Radio Club (NU5DE) is a unique ham radio club that operates from Star Ranch Nudist Resort in McDade, Texas, combining nude recreation with amateur radio operations. The site showcases their custom QSL cards, including their award-winning 'barefoot' design, and documents their on-air activities during Nude Recreation Week from 2001 onward.
https://www.qsl.net/in3vrr
Roberto Vendrame (IN3VRR) out of Bolzano, Italy offers LOGvrr, a freeware amateur radio logging suite featuring a logbook, international callbook with 1.8 million entries, and PacketCluster support. The site provides free downloads of the software in ARJ archives, ISO disc images, and supporting utilities for ham radio operators managing QSOs and LoTW confirmations.
https://vu2ese.com/
Ashhar Farhan (VU2ESE) is an Indian radio amateur who designs and builds his own transceivers, SDRs, and test equipment, sharing full schematics and source code freely with the builder community. Highlights include the BITX SSB transceiver, the hackable sBitx SDR with integrated FT8 support, and a growing collection of homebrew test gear like spectrum analyzers and tone generators.
https://ocraces.org/
OCRACES is the official site for the County of Orange Radio Amateur Civil Emergency Service, an auxiliary communications unit operating under the Orange County Sheriff's Department Emergency Management Division. Visitors can find membership information, net schedules, past events, and details about how trained amateur radio operators provide voice, video, and data emergency communications during disasters.
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.
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.
http://nightskylive.net/sd
NightSkyLive appears to be a live sky or astronomy viewing resource, likely offering real-time or streaming views of the night sky. The domain and subdirectory suggest a science-focused project aimed at stargazers and astronomy enthusiasts.
https://www.qsl.net/kb1bot/index.html
The Connecticut DX Association (CTDXA) is a ham radio club founded in 1983 dedicated to long-distance international amateur radio contacts, known as DXing. The site includes member listings, meeting details at ARRL Headquarters in Newington CT, award information, and links to DX bulletins and DXpedition resources.