Tuesday, August 29, 2006

New image of Cassiopeia A

The people at the Hubble Space Telescope have released a new image of the supernova remnant Cassiopeia A. The star is the youngest supernova remnant in our galaxy and therefore interesting to astronomers to study. It's only about 340 years old. Somewhat mysteriously, there are no records of it being observed in the 17th century. Perhaps it first appeared in the daylight sky and no one noticed. By the time it appeared in the night sky it would have faded from naked eye view.