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://amrad.org/
AMRAD, the Amateur Radio Research and Development Corporation, is a technical ham radio club based in Fairfax, Virginia, focused on cutting-edge projects like weak signal detection, low frequency (LF) experimentation, software-defined radio (SDR), and spread spectrum research. The site serves as a hub for members and enthusiasts alike, featuring project documentation, newsletters, forums, and meeting information for this long-running research-oriented amateur radio organization.
https://whiskeytangohotel.com/
WhiskeyTangoHotel.Com is a hobbyist electronics and amateur radio blog featuring hands-on projects like ESP32 microcontroller builds, temperature logging with Node-RED, and Morse code analysis tools. The site blends practical hardware tutorials with radio operator interests, making it a great find for tinkerers who enjoy cheap microcontrollers and DIY data visualization.
https://members.tripod.com/~Sam_KD6PIZ/index.html
Samuel Thornton (KD6PIZ) shares his ham radio hobby alongside family photos and links to WWII warbird organizations on this classic Tripod personal page. An active U.S. Air Force member stationed in Columbus, Mississippi, Sam mixes his passion for amateur radio with interests in historical aircraft like the B-17 and B-24.
https://kb3lyb.com/
KB3LYB is an amateur radio blog by a Pittsburgh-area ham documenting technical projects like setting up an Echolink node for the W3EXW repeater on 147.090MHz. The site includes detailed wiring diagrams, hardware bill-of-materials, and Raspberry Pi/SvxLink configuration notes useful to other hams attempting similar builds.
https://mistal2.tripod.com/CAS
The Cumberland Astronomical Society is an amateur astronomy club based in Gallatin, Tennessee, dedicated to bringing astronomy to the general public. The club hosts monthly events at local schools, libraries, and parks, though this Tripod page now redirects visitors to their updated website at CumberlandAstronomicalSociety.org.
https://palosverdes.com/fmarc
The Foggy Mountain Amateur Radio Club (FMARC) serves ham radio operators in the Palos Verdes area, featuring club news, meeting announcements, and topics like APRS/GPS integration with amateur radio. Maintained by Jack Carter (KC6WYX), the site includes highlights such as a monthly YL QSL card feature and coverage of real-world ham radio operations at the Rose Parade.
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://nrao.edu/pr/2000/vla20/background
A commemorative background page from the National Radio Astronomy Observatory celebrating the VLA radio telescope's first twenty years of scientific discovery, covering breakthroughs from Mercury's icy poles to gravitational lenses and gamma ray bursts. Packed with links to research highlights, aerial photos, visitor information, and introductory radio astronomy materials, it serves as both a historical record and an educational gateway to one of the world's most powerful telescopes.
http://astroimages.com/
George Greaney's dedicated astrophotography site showcases deep sky astronomical images captured using both CCD and film techniques from his Ash Meadows Observatory in Nevada. Visitors can explore galleries of images taken with a Ritchey-Chretien 14.5-inch telescope, along with detailed sections on equipment, image processing software, and darkroom techniques for enhanced color astrophotography.
http://www.zerobeat.net/
ZeroBeat.net is a hub for radio communications enthusiasts, featuring technical articles, historical items, and resources covering amateur radio topics like CW telegraphy, QRP low-power operation, and R.L. Drake equipment. Visitors will find links to antenna handbooks, online licensing exams, Morse code resources, and submarine radio operations, making it a handy reference for hams of all experience levels.