... Does an old, red globular cluster have any hot, blue stars? ... Pictured, Omega Centauri is the largest known globular cluster of over 200 in our Galaxy, containing well over a million stars. ... The Plane of the Ecliptic is well illustrated in this picture from the 1994 lunar prospecting Clementine spacecraft. Clementine's star tracker camera image reveals (from right to left) the Moon lit by Earthshine, the Sun's corona rising over the Moon's dark limb, and the planets Saturn, Mars, and Mercury. ...