NGC 6357
NGC 6357 is a diffuse nebula in the constellation Scorpius. It is a cluster of clusters that contains at least three clusters of young stars, including many hot, massive, luminous stars.[1] Star formation with numerous filaments of dust and gas surround huge cavities of massive star clusters. It spans around 100 light years and is located 5,500 light years from Sol.[2]
It is also known as the Lobster Nebula or the War and Peace Nebula.[3][4]