http://stardate.org/astro-guide/ssguide/solar_system
K-12 StarDate is the public education and outreach arm of the University of Texas McDonald Observatory. The radio program airs daily on more than 300 stations. And their popular bimonthly astronomy magazine is the perfect skywatching companion for amateur astronomers or anyone interested in celestial events and space exploration. The site offers astronomy resources to teachers, the media, and the public.
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