The Evolving Universe

Our Galaxy: The Milky Way

Cassiopeia A Supernova Remnant

CasA image

Credit: NASA/CXC/MIT/UMass-Amherst

Observers: Michael Stage

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Distance from Earth: 11,000 light years
Size: 16 light years
Telescope: Chandra
Light: X-ray (RGB 0.5-1.5, 0.5-0.8, 0.2-0.3 nm)