NGC 2403: Ground-based and Hubble View

This composite image shows a ground-based image of NGC 2403 and the location of a 10,000 light-year-wide square region imaged with the Hubble Space Telescope's Advanced Camera for Surveys. The area is host to Supernova 2004dj, the closest explosion of a massive star in over a decade, which blazes with the light of 200 million Suns.