*Description*: Image of the supernova remnant Cassiopeia A (Cas A) taken with the Hubble Space Telescope Advanced Camera for Surveys in March 2004. Technical facts about this news release: About the Object Object Name: Cassiopeia A Object Description: Supernova Remnant Position (J2000): R.A. 23h 23m 24s Dec. +58° 48' 54" Constellation: Cassiopeia Distance: About 10,000 light-years 3,100 parsecs away. Dimensions: This image is 8.5 arcminutes (25 light-years or 7.7 parsecs) wide. The bright remnant shell has a diameter of about 4 parsecs (13 light-years). About the Data Data Description: This image was created from HST data from the following proposals: 9890 and 10286, both by: R. Fesen (Dartmouth College), J. Morse (NASA Goddard Space Flight Center), J. Raymond (Harvard-Smithsonian Center for Astrophysics), R. Chevalier (University of Virginia), and M. Dopita (Australian National University). Instrument: ACS/WFC Exposure Date(s): March, 2004 and December, 2004 Exposure Time: 2.3 days Filters: F625W (SDSS "r"), F775W (SDSS "i") , and F850LP (SDSS "z") About the Image Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration Release Date: August 29, 2006 Colors This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using several different filters. Three filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: F625W blue F775W green F850LP red Orientation/Scale: Supernova Remnant Cassiopeia A - December 2004 [ http://imgsrc.hubblesite.org/hu/db/2006/30/images/a/formats/compass_large_web.jpg ] What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. A new image taken with NASA's Hubble Space Telescope provides a detailed look at the tattered remains of a supernova explosion known as Cassiopeia A (Cas A). It is the youngest known remnant from a supernova explosion in the Milky Way. The new Hubble image shows the complex and intricate structure of the star's shattered fragments. The image is a composite made from 18 separate images taken in December 2004 using Hubble's Advanced Camera for Surveys (ACS). *News Release Number:*: STScI-2006-30b
