The Pillars of Eagle Castle

What lights up this castle of star formation? The familiar Eagle Nebula glows bright
in many colors at once. The above image is a composite of three of these glowing gas
colors. Pillars of dark dust nicely outline some of the denser towers of star formation.
Energetic light from young massive stars causes the gas to glow and effectively boils
away part of the dust and gas from its birth pillar. Many of these stars will explode after
several million years, returning most of their elements back to the nebula which formed
them. This process is forming an open cluster of stars known as M16.