Object: Cas A Supernova Remnant

View full image: IU_Bicentennial_CasA.jpg

Caption: Cas A is the remnant of a star that exploded about 350 years ago in the direction of the constellation Cassiopeia. The hot, gaseous remnant is expanding at a velocity of about 3000 miles per second, and has reached a diameter of about 10 light years.

Image credit: L. van Zee, G. Rowe, & IU Astronomy

This project was partially funded by the Daniel Kirkwood Chair, the Hollis and Grete Johnson Astronomy Endowment funds, and from the Office of the Bicentennial.