@Polaris 16 March 2021 more from that month

M27: Not a Comet Credit & Copyright: Matthew T. Russell Explanation: While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets. This is number 27 on his now famous not-a-comet list. In fact, 21st century astronomers would identify it as a planetary nebula, but it's not a planet either, even though it may appear round and planet-like in a small telescope. Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core. Read more: https://apod.nasa.gov/apod/ap100826.html?hcb=1&fbclid=IwAR2_mQZjbGLUbF2Ir_oRULFh1Oee7aoAYaKIXyCtYa61mdEJgmXqGbyq6Nw #Astronomy