Caption:
The Jellyfish Nebula, IC 443, at left near the star Eta Geminorum. IC 443 is a supernova remnant. At upper right is the bright open star cluster Messier 35. The smaller and fainter star cluster below M35 is NGC 2158. M35 is 2500 light years away but NGC 2158 is 16,500 light years away.