Astronomy Coalsack Nebula Observed For At Least 40,000 Years: A Cosmic Sackful Of Black Coal MessageToEagle.com | October 19, 2015 MessageToEagle.com – The Coalsack Nebula is located about 600 light-years away in the constellation of Crux (The Southern Cross), which is approximately 20 – 30 light-years across. It’s Read More