Orion nebula
Recent observations with the Hubble Space Telescope have shown protoplanetary disks inside the Orion Nebula. This is a major discovery. They are called proplyds for short. There are more than 150 of these in the nebula. They are thought to be to be systems in the earliest stages of planetary system formation. The sheer numbers have been used as evidence that the formation of star systems is fairly common in the universe.