Title:[0989] The Triangulum galaxy Caption:M33, NGC 598, type Sc spiral galaxy in the constellation Triangulum, one of the spiral galaxies nearest to our own Milky Way, 2.4 million light years distant, and one of the Local Group of Galaxies. Copyright: Credit:National Optical Astronomy Observatories

Title:[1058] Prime focus of the Kitt Peak 4-meter telescope Caption:This true-color picture was taken using Ektachrome film at the prime focus of the Kitt Peak 4-m telescope in 1973. Due to reciprocity failure during the quite long exposure needed, the image is slightly bluer than it should be. The spiral structure of the galaxy is clearly seen, as is the giant H II region designated NGC 604 (the reddish spot in the upper left). The third largest galaxy in our own Local Group (after the Andromeda Nebula, M31, and our own Galaxy), M33 (NGC 598) is over 30,000 light years across, and more than two million light years away, appearing on the sky in the constellation Triangulum. Copyright: Credit:National Optical Astronomy Observatories/W. Schoening/N. Sharp