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://qsl.net/ik1hgi/atv.htm
A personal amateur radio page from Italian ham operator IK1HGI, covering ATV (amateur television) and low-frequency 472kHz QRP operation. The site touches on antennas, dipoles, and radio towers, offering a glimpse into the operator's station and technical interests.
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.
https://scopereviews.com/
Ed Ting's telescope review site has been gathering light since 1997, offering one of the most comprehensive collections of telescope reviews on the internet with over 100 scopes evaluated, eyepiece reviews, beginner buying guides, and a telescope rankings matrix. Video reviews, Q&A columns, and feature articles make this a go-to resource for anyone from first-time buyers to seasoned amateur astronomers.
http://stratigrafia.org/cincy
Created by Steven Holland of the UGA Stratigraphy Lab, this site documents the extraordinary fossil record and rock strata of the Upper Ordovician near Cincinnati, Ohio, covering over 470 genera and 1200 species. It combines detailed paleontology with cutting-edge stratigraphic interpretation, making it a valuable reference for both professional researchers and amateur fossil enthusiasts.
http://spaceshipone.airshowjournal.com/2004
Fred Bruenjes documents his firsthand experience photographing the historic June 21, 2004 launch of SpaceShipOne, the first privately funded spacecraft to reach space, at Mojave Airport. The site is part of a larger airshow journal covering dozens of air shows across California and beyond, featuring hundreds of original photos from events ranging from Miramar to Oshkosh.
https://skymarvels.com/
SkyMarvels is an astronomy education site that guides visitors through the night sky and solar system using interactive animations, videos, and the free 3-D simulation software Celestia. Covering everything from individual planets and moons to deep-sky objects and the scale of the cosmos, the site offers a genuinely immersive experience suitable for beginners and enthusiasts alike.
http://astrosurf.com/cidadao
António Cidadão's dedicated astronomy site showcases years of lunar and planetary observation from Carcavelos, Portugal, featuring CCD imaging of the Moon, Mars, Jupiter, and Saturn captured with a 14-inch SCT telescope. The site includes detailed imaging guides covering super-resolution techniques, tri-colour imaging, limb darkening correction, time-lapse animations, and a Moon-Light Atlas reference, making it a rich resource for amateur planetary imagers.
https://naa.net/
The Nürnberger Astronomische Arbeitsgemeinschaft (NAA) is a German astronomy club based in Nuremberg that operates the Regiomontanus Observatory, offering public sky tours twice a week and maintaining a library of over 1600 books. The site covers club activities, upcoming events, an astronomical image gallery, and the club's own journal 'Regiomontanusbote', making it a rich hub for amateur astronomy in the Nuremberg region.
http://rfchoke.com/
A technical reference site dedicated to RF chokes, ferrite cores, and related radio frequency electronics components used in amateur radio and RF engineering applications. Visitors will find practical information on choke design, impedance characteristics, and suppression of common-mode currents on antenna feedlines.
https://qsl.net/ke4ish
KE4ISH is the personal ham radio page of a licensed operator in Liberty County, Georgia, with over 20 years of professional communications experience spanning the Army and telephone industry. The site covers his role as Assistant Emergency Coordinator, involvement with Georgia Army MARS, local club and repeater info, and participation in the Amateur Radio Webring.