A bubble of blueish gas expands in the lower center of the image. Gas and dust in yellow, green, and brown hues fills the rest of the image.

Caldwell 11, The Bubble Nebula

Better known as the Bubble Nebula, Caldwell 11 is a colorful region of gas and dust that stretches 6 light-years

Credits: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)