Amid a backdrop of far-off galaxies, the majestic dusty spiral, called NGC 3370, looms in the foreground in this NASA Hubble Space Telescope image. Observations show an intricate spiral arm structure spotted with hot areas of new star formation. But this galaxy is more than just a pretty face. Nearly 10 years earlier NGC 3370, in the constellation Leo, hosted a bright exploding star. NGC 3370 (also known as UGC 5887 or Silverado Galaxy is a spiral galaxy about 98 million light-years away in the constellation Leo. It is comparable to our own Milky Way both in diameter (100,000 light years) and mass (1011 solar masses). NGC 3370 exhibits an intricate spiral arm structure surrounding a poorly defined nucleus. Release date September 4, 2003.