NGC 604 is a giant H II region in the Triangulum Galaxy. One of the largest star-forming regions in the Local Group of galaxies, it is about 1,500 light years across - 50 times larger than the Orion Nebula. Credit: H. Yang, J. Hester, NASA
NGC 604 is a giant H II region in the Triangulum Galaxy. One of the largest star-forming regions in the Local Group of galaxies, it is about 1,500 light years across - 50 times larger than the Orion Nebula. Credit: H. Yang, J. Hester, NASA