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://monitoringtimes.com/html/mttopHF.html
Monitoring Times presents a curated list of over 1000 active HF frequencies compiled by Larry Van Horn (N5FPW), covering military, marine, government, and civil air patrol communications worldwide. A valuable reference for shortwave listeners and scanner enthusiasts, the list spans frequencies from 2 MHz to nearly 30 MHz with detailed mode and geographic information.
https://g7kse.co.uk/
G7KSE is a UK amateur radio operator's personal site packed with projects, documentation, and blog posts covering SOTA activations, HF through 13cm, QRP operating, APRS, LoRa, Meshtastic, and homebrew antenna builds. The site also includes coding projects like HamDash and HamTool, Raspberry Pi tinkering, and CW decoding resources, making it a genuinely useful reference for fellow radio enthusiasts.
http://twisterdata.com/
TwisterData.com is a meteorological data tool built in 2008 by storm chasers David Demko and Donald Giuliano, offering RAP, NAM, and GFS weather model forecasts with detailed atmospheric parameters like CAPE, hodographs, helicity, and sounding data. Designed with a clean, data-first philosophy, it pulls from NOAA datasets and is especially valuable for storm chasers, meteorologists, and serious weather enthusiasts who need raw model output without distractions.
https://astropublishing.com/
Astro Publishing offers a free multilingual astronomy magazine available to read and download in full, with a mission to bring astronomy culture to the widest possible audience. All issues can be accessed directly from the site, which is notable for its strict no-tracking, no-cookie privacy policy.
http://sss-mag.com/eme.html
Part of the Spread Spectrum Scene (SSS Online) website, this page is a curated link directory focused on Earth-Moon-Earth (EME) moonbounce communications for ham radio operators. Visitors will find links to operator pages, equipment guides, activity loggers, and resources covering weak signal propagation, SETI, DSP, and related amateur radio topics.
https://www2.mmm.ucar.edu/imagearchive
Hosted by UCAR's Mesoscale and Microscale Meteorology Laboratory, this archive provides a collection of meteorological case study images for researchers and forecasters. The Case Selection Kit Image Archive serves as a reference tool for selecting and studying atmospheric weather cases, making it a useful resource for those in the meteorological sciences.
http://pactor.com/
Phil Sussman (N8PS) runs this dedicated resource covering PACTOR, a digital HF radio mode, including news, updates, and reflections on its declining use among amateur radio operators. The site features hardware reviews of SCS PTC TNCs, links to logging software, and candid commentary on the state of digital amateur radio communications.
https://arpgalaxy.com/
A comprehensive amateur astronomy resource dedicated to Halton C. Arp's Atlas of Peculiar Galaxies, cataloging all 338 peculiar and interacting galaxy entries with supporting data, imagery, and observing guidance. Built by and for amateur observers, the site bridges professional archival photography from the Palomar 200-inch telescope with modern amateur CCD imaging to show that anyone with a backyard telescope can observe these remarkable objects.
http://hanssummers.com/
Hans Summers (G0UPL) shares his deep passion for radio, electronics, and computing through dozens of detailed project pages covering QRSS beacons, WSPR kits, homebrew transmitters, Nixie clocks, frequency counters, and more. The site is a treasure trove for QRP enthusiasts and homebrewers, showcasing everything from crystal radios to synthesizer design and the popular QRP Labs kit lineup.
https://cryothene.neocities.org/
Cryothene is a technically-minded personal blog covering electronics projects, embedded systems, reverse engineering, and 3D printing, with standout documentation of a custom display driver project called Sharpie spanning many installments. The site also mixes in anime opinions, game reviews, and occasional recipes, but the dominant draw is its detailed hardware and microcontroller writeups.