Science & Nature
1413 sites
Subcategories:
- Astronomy & Space (390)
- Chemistry (7)
- Earth Sciences (24)
- Biology (76)
- Physics (29)
- Mathematics (51)
- Weather & Climate (100)
- Amateur Radio (681)
- Electronics (45)
https://roanestate.edu/pages/obs/index.htm
The Tamke-Allan Observatory at Roane State Community College in East Tennessee hosts public stargazes, telescope-making workshops, and astrophotography events for students and amateur astronomers alike. Visitors can explore images of nebulae and planets captured through the observatory's equipment, find astronomy calendars for the Knoxville area, and connect with the local ORION observing group.
https://eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2017Aug21Tgoogle.html
Fred Espenak's NASA Eclipse Website hosts an interactive Google Maps tool showing the precise path of totality for the August 21, 2017 total solar eclipse, including central line, northern and southern limits, and 10-minute interval markers. Hosted by NASA's Goddard Space Flight Center, the page provides detailed data on greatest eclipse, greatest duration, lunar limb profiles, and eclipse weather resources.
https://www.qsl.net/w5wx
A QSL.net-hosted personal page for amateur radio operator W5WX, accessible via the QSL.net directory structure. The site appears to be a file index for a ham radio enthusiast's web presence on one of the most popular amateur radio hosting services.
http://ka7oei.blogspot.com/2026/03/modifying-mfj-5008-parabolic-ultrasonic.html
KA7OEI is Clint's technically-focused amateur radio and electronics blog, covering hands-on modifications and experiments with devices like the MFJ-5008 parabolic ultrasonic receiver. This particular post dives deep into improving the sensitivity and frequency response of the discontinued ultrasonic tool, with detailed photos, circuit analysis, and practical applications like bat detection and power line fault finding.
http://deep-sky.co.uk/asterisms.htm
David Ratledge's guide to observing asterisms takes readers through a collection of star patterns visible through binoculars and small telescopes, complete with images and observing tips. Inspired by a 1998 Sky & Telescope article, this page celebrates overlooked celestial dot-to-dot patterns like Kemble's Cascade, the Coathanger, and the ET Cluster with genuine enthusiasm and hands-on detail.
https://astrorx.org/
The Astronomical Society of the Desert (ASOD) is an amateur astronomy club with resources for beginners, star party schedules, observing site information, and membership details. Maintained by Bruce G, this old-web club homepage offers a glimpse into organized community stargazing in a desert region ideal for clear-sky observing.
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.
http://foxdelta.com/
Fox Delta, operated by K7SFN, I2TZK, and VU2FD, is a direct-sales kit shop and project resource for amateur radio enthusiasts, offering RF amplifiers, SWR meters, antenna rotator software, and more. The site features a range of active and previous hardware kits including the PA-100 IRF510 RF amplifier and ST2 USB interface, all sold exclusively through this site with no third-party dealers.
https://kc1xx.com/
KC1XX is the site for a competitive amateur radio station, featuring details about the station setup, antenna systems, and the team behind the operation. Visitors can browse the station gallery, search logs, and request QSL cards, with a bonus section covering the HJ4XX DX expedition.
http://kellysky.net/
Al Kelly's dedicated astrophotography site showcases stunning CCD images of galaxies, nebulae, star clusters, and solar system objects captured with equipment including a Celestron CGE 1400 telescope and Orion Parsec 8300C camera. Beyond the image galleries, the site offers a CCD instruction manual, a G2V color calibration article, and links to fellow astrophotographers, making it a valuable resource for amateur astronomers interested in CCD imaging.