Astronomy & Space
396 sites
http://bobsknobs.com/
Bob's Knobs sells specialized collimation thumbscrews that let telescope owners align their Cassegrain and Newtonian telescopes without any tools. The product line covers knobs for popular telescope brands including Losmandy, Celestron, and TeleVue mounts, with custom sizing options and downloadable installation guides.
https://openphdguiding.org/phd2-log-viewer
PHD2 Guiding is the home of PHD2, a free and open-source autoguiding software used by astrophotographers to keep telescopes precisely locked on celestial targets. This page highlights a log file viewer tool developed by Andy Galasso, which helps users visualize guiding performance and diagnose tracking issues from their PHD2 guide logs.
https://gaac.us/
The Gloucester Area Astronomy Club (GAAC) is a casual, no-dues astronomy group founded in 2003 that meets monthly at the Lanesville Community Center in Gloucester, Massachusetts. The site features member photo galleries, ephemerides, aurora alerts, object rise/set times, and a calendar of events for anyone curious about the night sky.
https://iceinspace.com.au/
IceInSpace is the largest online amateur astronomy community in the Southern Hemisphere, serving over 20,000 registered members across Australia, New Zealand, and South America. The site features astronomy forums, equipment reviews, DIY projects, astrophotography galleries, event reports, and an astronomy glossary tailored to southern hemisphere observers.
https://radiojove.gsfc.nasa.gov/library/newsletters/2008Dec
The December 2008 issue of The JOVE Bulletin covers NASA's Radio JOVE Project, a program enabling students and educators to build simple radio telescopes and observe solar and planetary radio emissions. Highlights include field reports of Jupiter radio storm observations, a gallery of radio spectrograms, and news about Radio-SkyPipe 2 software for amateur radio astronomy.
https://solarviews.com/eng/mars.htm
Calvin J. Hamilton's comprehensive Mars reference page covers everything from the planet's geology and atmosphere to its moons, polar regions, and exploration missions like Viking, Pathfinder, and the Mars Rovers. Packed with images, animations, 3D galleries, and scientific articles, it serves as a deep-dive educational hub for anyone fascinated by the Red Planet.
http://gazers.org/
The Penobscot Valley Star Gazers (PVSG) is a Maine-based astronomy club hosting monthly meetings both in-person at John Bapst High School in Bangor and via Zoom. The site offers a calendar of upcoming events, a gallery, an archive, and real-time comet tracking resources for members and stargazing enthusiasts in the region.
https://covingtoninnovations.com/astro/index.html
The companion website to Michael A. Covington's book 'Astrophotography for the Amateur,' published by Cambridge University Press, covering film astrophotography, CCD imaging, and image processing. Visitors can browse a picture gallery of Covington's own astrophotos, download free astrophotography software, and find corrections and updates to the book.
http://meteorite-identification.com/
Meteorite-identification.com helps enthusiasts and beginners distinguish genuine meteorites from 'meteor-wrongs,' offering identification tests, case studies of misidentified specimens, and commentary on media coverage of meteorite claims. The site also covers meteorite collecting as a hobby, with guidance on buying specimens and evaluating suspect auction listings on eBay.
https://handprint.com/ASTRO/bortle.html
A detailed reference page explaining the Bortle Dark Sky Scale, which measures night sky light pollution across nine categories from inner-city skies to pristine darkness. The site includes an adapted table of Bortle's indicators with color codes used in light pollution maps, plus five star charts covering key sky areas visible from the continental United States.