|  |  | Beautiful, Eerie Dark Clouds of the Carina Nebula [APOD] apod.nasa.gov — What dark forms lurk in the mists of the Carina Nebula? These ominous figures are actually molecular clouds, knots of molecular gas and dust so thick they have become opaque. In comparison, however, these clouds are typically much less dense than Earth's atmosphere. Pictured above is part of the most detailed image of the Carina Nebula ever taken.More... (Space) Comments Email Added 2008-05-28 17:00:08 marksmayo