For years, researchers have wondered why there is a hole in the heart of the Rosette Nebula, 5,000 light-years from Earth in the Monoceros (unicorn) constellation of our Milky Way galaxy.
원문출처 : https://www.cnn.com/2018/02/14/world/rosette-nebula-heart/index.html
원문출처 : https://www.cnn.com/2018/02/14/world/rosette-nebula-heart/index.html