Both objects lie close to one another in the constellation of Cassiopeia. #BubbleNebula is a nearly spherical emission nebula sculpted by the powerful stellar winds of a central, young massive star. #Messier52 is a rich open cluster thousands of light years away, full of young, bright suns.

Remember Cassiopeia, the mythological Ethiopian queen famed for her vanity? It seems she have developed a little "pimple" on her face! Let's take a closer look at #BubbleNebula and its companion #Messier52 [🧵 THREAD]