NGC 604 is a H II region inside the Triangulam Galaxy. It was discovered by William Harschel on 11th Sep,1784. It is one of the largest H II regions in the Local Group of galaxies estimated distance of 2.7 million light-years it's longest diameter is roughly 1500 light-years(460 parsecs) over 40 times the size of the visible portion of the Orion Nebula. It is over 6300 times mo
re luminous than the Orion Nebula and if it were at the same...