S. F. Wessling Observatory
Sky and Telescope
Kropscott Farm Environmental Center
Michigan Conservation Districts
Grand Rapids Amateur Astronomical Association
Newaygo County Advanced Technology Services
Radio JOVE Project
Hubble Site
Star Date Astro Guide
SpaceWeather.com
Kid's Astronomy
NASA Science
Space.com
Michigan Astronomy
Roger B. Chaffee Planetarium
Down Under Observatory

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