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About the Image

About the Object

Color Mapping

Astrometrics

12.20.07

Supernova Remnant Cassiopeia A: Silicates

The Cassiopeia A supernova remnant is located about 10,000 light-years away in our own Milky Way galaxy.

This infrared view shows a collection of dust (red), including proto-silicates, silicate dioxide and iron oxide.

The data for this image were taken by Spitzer's infrared spectrograph, which splits light apart to reveal the fingerprints of molecules and elements. In total, Spitzer collected separate "spectra" at more than 1,700 positions across Cassiopeia A.