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Date: 30 August 2006 Copyright: ESA/Hubble, NASA and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration Show in archive: true
This video shows Hubble observations of the young supernova remnant Cassiopeia A, obtained with the ACS instrument. After zooming in, the view pans over the remnant and blinks between two observations made 9 months apart. The difference between the two reveals the expansion of the ejected material in the supernova remnant.