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Wispy Supernova Remnants

This Hubble Space Telescope image offers an intimate view of supernova Cassiopeia A's frayed remains. This spherical object is the youngest supernova remnant found to date within the Milky Way. This image is a mosaic of 18 separate images taken by Hubble's Advanced Camera for Surveys (ACS).

Photograph courtesy NASA/ESA/Hubble Heritage Team