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://stormeffects.com/
Brian Morganti's StormEffects is a personal archive of storm chasing photography, nature landscapes, and severe weather experiences captured over many years. Visitors can browse storm photos, chase videos, chase summaries, and even astrophotography, making it a rich showcase of one enthusiast's passion for extreme weather.
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://amateurfunk.de/
Jürgen Mayer (DL8MA) maintains this German amateur radio page covering emergency communications, AREDN mesh networking, LoRa/LoRaWAN IoT, and QO-100 satellite operations. The site also connects to the Notfunkreferat for the Württemberg district, making it a hub for regional ham radio emergency preparedness.
https://flintriverastronomy.org/
The Flint River Astronomy Club (FRAC) is a Georgia-based astronomy club serving the Griffin area, hosting monthly meetings, public observing events at Indian Springs State Park, and club observing weekends at Joe Kurz WMA. Members have access to observing lists, tools, national awards, newsletters, and articles, making this a well-rounded hub for amateur astronomers in the region.
https://tonnesoftware.com/
Tonne Software offers a catalog of free and low-cost electrical engineering programs for Windows, covering filter design, meter scale drawing, great-circle mapping, Smith charts, and more. The site also hosts technical articles and tutorials on topics like speech processing, AM demodulators, and CW bandpass filters, many published or submitted to QEX magazine.
https://k7mva.org/mvhams.html
The Magic Valley Amateur Radio Club (MVARC), operating under callsign K7MVA, is a ham radio club based in Idaho with sections for nets, repeaters, testing, and ARES-RACES emergency communications. This redirect page points visitors to the club's new home at K7MVA.org, where members can access meeting minutes, bylaws, licensing resources, and a free ham software listing.
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.
http://websdr.org/
WebSDR.org is the home of the WebSDR project, a network of software-defined radio receivers accessible via a web browser, allowing anyone to tune into shortwave, amateur radio, and other RF signals from around the world. The site connects users to SDR servers hosted by universities, radio clubs, and hobbyists, making radio listening accessible without any special hardware.
https://www.qsl.net/w4unc
This QSL.net page belongs to the amateur radio callsign W4UNC, hosted on the popular ham radio web community platform. The directory index suggests a personal station page typical of ham operators sharing their radio activities and station information.
https://qsl.net/sv2ael/sv2ael.files/qsls_flags/qsl_flags1.htm
SV2AEL is a Greek amateur radio operator's gallery showcasing QSL cards and national flags organized alphabetically by DX country, complete with call sign prefixes, continents, and CQ zones. A comprehensive reference for ham radio enthusiasts interested in DX contacts and international QSL card collecting.