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)
http://pasnola.org/
The Pontchartrain Astronomy Society, established in 1959, is a non-professional astronomy club serving Southeast Louisiana with events, observing sites, forums, and newsletters. Members gather to discuss celestial objects, attend star parties, and access resources like Clear Sky Charts and ISS sighting schedules for the New Orleans area.
http://nightskyhunter.com/An%20Observing%20Guide%20To%20Comets.html
Created by Martin McKenna of Nightskyhunter.com, this detailed guide covers everything an amateur astronomer needs to observe comets, from naked-eye viewing to advanced astrophotography and scientific contribution through light curve work. The site includes comet sketches, hunting statistics, observing adventure logs, and links to major comet resources, making it a rich reference for anyone fascinated by these unpredictable visitors to our skies.
https://astronomy-links.net/SETI_Battleship.html
Clark M. Thomas offers a witty essay examining the movie Battleship through the lens of real SETI science, exploring the plausibility and implications of contact with extraterrestrial civilizations. The piece weaves together astronomy, pop culture criticism, and philosophical musings about what our radio and TV signals might reveal to any alien observers.
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.
http://users.netonecom.net/~swordman/Radio/unun.htm
Doug's page details the hands-on construction and testing of an impedance-matching transformer (Unun) for connecting a 350-foot long-wire antenna to a shortwave receiver. Complete with photos of the wound toroid core, schematic references, and bandscanning results comparing performance with and without the transformer, it's a practical reference for anyone building receiving antenna accessories.
https://astronomy.swin.edu.au/cosmos
COSMOS is a comprehensive astronomy encyclopedia produced by research astronomers at Swinburne University's Centre for Astrophysics and Supercomputing, covering topics from the Planck Length to galaxies for a general but detail-hungry audience. The encyclopedia is an evolving reference used by major astronomy outlets including Universe Today, Astronomy Cast, and Astronomy Picture of the Day, making it a trusted hub for astronomical knowledge.
https://www.qsl.net/na4sh
The Nash County ARES (Amateur Radio Emergency Service) is a volunteer group serving Nash County and Rocky Mount, North Carolina by providing emergency communications during disasters like hurricanes, floods, and tornadoes. The site covers their weekly nets on local repeaters, links to weather resources, and connections to state and national ARES organizations.
https://www.qsl.net/w2lj
The official home of the NJQRP Skeeter Hunt, an annual outdoor QRP radio operating event that challenges amateur radio operators to leave their shacks and make contacts in the field using home-brewed or kit-built equipment. Now in its 14th year, the site hosts scoreboards and soapbox comments dating back multiple years, making it a rich archive of this beloved low-power radio community tradition.
http://xjubier.free.fr/en/site_pages/solar_eclipses/TSE_1972_GoogleMapFull.html
Xavier Jubier's interactive Google Map documents the path of the July 10, 1972 total solar eclipse over Canada, offering precise geographic visualization of the totality corridor. Part of a larger solar eclipse resource site by Jubier, this page is a valuable reference for eclipse chasers and astronomy enthusiasts researching historical eclipse paths.
http://muzique.com/
Jack Orman's AMZ is a deep well of DIY guitar effects pedal knowledge, offering free schematics, project guides, a lab notebook, and a blog covering circuits for fuzzboxes, boosters, overdrives, and more. With decades of content, PCB boards for sale, and downloadable ebooks, it stands as one of the most comprehensive stompbox electronics resources on the old web.