One of the sky’s standout objects is the Tarantula Nebula, also known as the True Lovers’ Knot, Caldwell 103, and 30 Doradus. At the center of this HII region (a cloud of ionized hydrogen) is the massive open cluster NGC 2070. It’s the central group of ultrahot stars in this cluster that produces the ultraviolet radiation that makes the nebula glow.
It’s too bad that most amateur astronomers living in the Northern Hemisphere haven’t observed the Tarantula Nebula.