Various short videos from the Spitzer web site series 'Ask An Astronomer'. 0.00 Can you feel a solar wind? (2002-002) 1.40 Do other solar systems exist? (2003-004) 3.38 Are other solar systems like our own? (2003-005) 5.30 Do the stars really move? (2005-002) 8.12 What is a redshift? (2006-001)
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