Astronomy Sign Video
Upload On Thu Jan 20 2011 by ASL STEM
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Definition
Modern research in astronomy and astrophysics encompasses a large number of disciplines and specialties. Research areas include planetary astronomy, stellar structure and evolution, interstellar matter, x-ray sources, galactic structure, extragalactic astronomy, galactic dynamics, quasars and galactic nuclei, and theoretical and observational cosmology.
Source: University of Washington
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