Hubble Space Telescope: Kepler's supernova remnant (close-up, visible-light data)

Four hundred years ago a "new star" appeared in the western sky, rivaling the brilliance of the nearby planets. In fact this 'new star' was a supernova, now named Kepler's supernova, and was the last such object seen to explode in our Milky Way galaxy. Seen here are some of its remains. This imag...