Various short videos from the Spitzer web site series 'Ask An Astronomer'. 0.00 How do stars life & die? (2003-002) 2.15 What is a brown dwarf? (2003-003) 4.23 Why do we see spiral arms in some galaxies? (2005-001) 6.08 How can we see a black hole? (2006-002) 8.34 What is the nearest galaxy to the milky way? (2007-001) Source- http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/
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