Cartwheel Galaxy, ESO 350-40, is a lenticular galaxy about 500 mly away in the constellation Sculptor. It is an estimated 150,000 light-years across. The galaxy was once a normal spiral galaxy like the Milky Way before it apparently underwent a head-on collision with a smaller companion approximately 200 mya.
Preview of a Forthcoming Supernova - NASA's Hubble Telescope captured an image of Eta Carinae. This image consists of ultraviolet and visible light images from the High Resolution Channel of Hubble's Advanced Camera for Surveys. The field of view is approximately 30 arcseconds across.