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://lmars.org/
The Lake Monroe Amateur Radio Society (LMARS) is a ham radio club serving Seminole County and Central Florida, offering members resources like repeater information, a traffic net guide, licensing support, and a newsletter archive dating back to 2009. The site connects hams through regular meetings, fox hunts, Field Day operations, and community communications events, making it a solid hub for local amateur radio enthusiasts.
https://n2ty.org/
The Troy Amateur Radio Association is the official web presence for a ham radio club based in Troy, serving local amateur radio enthusiasts with club information and resources. A hub for the regional ham radio community, it connects operators interested in amateur radio activities, licensing, and club events.
https://asteroidoccultation.com/
Steve Preston's long-running resource provides predictions for asteroid occultation events, listing when asteroids will pass in front of stars as seen from Earth. Covering upcoming events through 2026 with supplementary observation guides and FAQs, it serves as a reference for amateur and professional astronomers tracking these brief but scientifically valuable phenomena.
http://redcircuits.com/
RED Free Circuit Designs is a hobbyist electronics resource offering dozens of free audio amplifier schematics, preamplifier modules, headphone amplifiers, and miscellaneous electronic circuit designs. Visitors can browse Class-A and Class-B amplifier projects, phono preamps, intercom circuits, and many more practical designs, all available at no cost.
https://stormdig.com/
StormDig is storm chaser James Hammett's personal site documenting over 15 years of severe weather pursuits, featuring detailed storm accounts of tornadoes, supercells, and hail events dating back to 2003. Visitors can explore chase maps, video footage, equipment specs, an aurora monitor, and a glossary, making it a richly detailed record of one dedicated chaser's adventures.
http://amwindow.org/
The AM Window is a dedicated hub for amateur radio operators interested in AM (amplitude modulation) operation, covering everything from audio and antenna tech to vintage equipment like Collins, Heathkit, and Johnson rigs. Visitors can explore video and audio clips, technical mods, tutorials, net frequencies, and stories from the AM operator community.
http://bo.astro.it/~biblio/atlas/atlas-in.htm
Hosted by the Library of the Department of Astronomy in Bologna, this scholarly site guides visitors through a curated collection of historic celestial atlases spanning the 16th through 18th centuries, from Piccolomini's Renaissance star maps to Bode's Uranographia. Created by Davide Neri, a philosopher and physicist, it beautifully bridges the history of science and art through some of the most celebrated astronomical cartography ever published.
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://www.qsl.net/mara/index.html
The Madison Area Repeater Association (MARA) is a non-profit amateur radio club based in Madison, Wisconsin, affiliated with the Wisconsin Association of Repeaters. This page serves as a hub for club members, listing meeting times and locations while redirecting visitors to their newer site.
https://owlsp.com/stormchaseaccounts.php
OWLSP.com is a storm chaser's personal archive covering tornado and severe weather chase accounts from 2002 through 2023, with detailed entries for specific outbreaks across Oklahoma, Texas, Kansas, and beyond. The site includes chase narratives, photography, equipment info, and landscape scenes, making it a rich firsthand record of Plains storm chasing over two decades.