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Intro Astronomy 2013. Class 2: How We Explore Space

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Lecture 2 of Dr. Bruce Betts' online Introductory Planetary Science and Astronomy course covers easy things to see in the night sky without a telescope (e.g., constellations, satellites, planets), and the electromagnetic spectrum (from gamma rays to visible to radio waves) -- what it is, and how and why we use different wavelength regions to explore planets, and even learn their compositions.  The class starts with guest Mat Kaplan, Media Producer for The Planetary Society, and Bruce and Mat record a What's Up segment for Planetary Radio.  Filmed at California State University Dominguez Hills.

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