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://www.qsl.net/wb1asl
WB1ASL's personal ham radio page dedicated to vintage 'boatanchor' radio equipment, featuring Rich's own collection including a Hammarlund HQ-170 and a Lil' LuLu prototype. The site also curates shortwave listening links including Glenn Hauser's World of Radio and DXing resources for radio enthusiasts.
https://mreclipse.com/
Fred Espenak, known as MrEclipse, is a renowned NASA astrophysicist who has dedicated this site to comprehensive solar and lunar eclipse resources, including photography guides, safety tips, and extensive photo galleries spanning from 1970 to the present. Visitors will find detailed previews of upcoming eclipses through 2040, firsthand accounts of totality, and stunning images captured across decades of eclipse-chasing expeditions.
https://theodoregray.com/PeriodicTable
Theodore Gray's landmark site documents his handcrafted wooden periodic table desk, which contains actual samples of all 118 chemical elements, with thousands of photos, rotatable 3D images, videos, and detailed information for each element. With over 2,379 samples, 471 minerals, and a wealth of interactive features including an element-spelling game and reaction balancing, this is one of the most thorough and visually stunning chemistry reference sites on the web.
http://billsnyderastrophotography.com/
Bill Snyder's astrophotography site showcases an extensive gallery of deep-sky images including nebulae, galaxies, and star clusters captured from his personal and shared observatories in Pennsylvania. The collection includes several NASA Astronomy Picture of the Day (APOD) winners and is organized into detailed categories covering narrowband, RGB, and HaRGB imaging techniques.
http://lightningwizard.com/maps/usa.html
Lightning Wizard provides detailed convective weather forecast maps for North America, Europe, and the Caribbean, pulling data from the National Centers for Environmental Prediction and the National Weather Service. The site covers advanced meteorological parameters like CAPE, bulk shear, and MSL pressure across multiple forecast time intervals, making it a valuable tool for storm chasers and weather enthusiasts.
https://electronics-notes.com/
Electronics Notes, created and maintained by engineer Ian Poole, is a comprehensive reference hub covering electronics theory, circuit design, components, radio technology, antennas, ham radio, and more. With tutorials aimed at everyone from hobbyists to professionals, it also offers downloadable guides, infographics, and component data sheets, making it a genuinely useful destination for anyone working with electronics.
https://wm7d.net/hamradio
WM7D dot Net is Mark A. Downing's extensive amateur radio link directory, organized into dozens of categories covering antennas, DX clusters, propagation, QRP, Morse code, satellite info, and much more. With five pages of curated links spanning everything from ARRL headquarters to shortwave and six-meter sites, it serves as a comprehensive reference hub for ham radio enthusiasts.
https://clarc.org/
The Clear Lake Amateur Radio Club (CLARC), operating under callsign K5HOU, has served the Clear Lake, Texas area since 1987 as an ARRL Special Service Club. Visitors can find information about weekly nets on the club's repeaters, licensing exams, Hamster Classes, and community communications support for public events.
http://messier.seds.org/
The SEDS Messier Database is a comprehensive reference for all 110 objects in Charles Messier's famous catalog of nebulae, star clusters, and galaxies, compiled by the French astronomer between 1758 and 1782. Visitors can browse detailed entries with images, follow Messier Marathon news and results, and explore deep sky objects organized by type, making this a go-to resource for amateur astronomers worldwide.
https://nsml.org/
The North Suburban Math League (NSML) organizes competitive math meets for Chicago-area high schools, with five competitions held throughout the school year. The site provides contest archives, meet schedules, written and oral topic lists, coach resources, and a history of NSML alumni who have earned medals at the International Mathematical Olympiad.