Astronomy Picture from 24/08/2018 Messier 20 and 21 Source: apod.nasa.gov/apod/ap180824.html #TrifidNebula #Messier20 #M20 #Messier21 #M21 #Sagittarius #DeepSkyObject #Astrophotography #Nebula #StarCluster #CosmicBeauty #Space #Astronomy #Stars #Galaxy