Trifid Nebula (annotated)

This closeup image of the Trifid Nebula (Messier 20 or M20) captured by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 (WFC3) shows compass arrows, scale bar, and colour key for reference. A jet of plasma ejected by a young protostar embedded in the brown dust, known as Herbig-Haro 399...