The Pillars of Eagle Castle . ... Credit Copyright: Emanuele Colognato Jim Wood ( Backyard Skies ) Explanation: 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 tower s of star formation . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...