... The Same Color Illusion . ... Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. ... NGC 7293: The Helix Nebula . ... A mere seven hundred light years from Earth, in the constellation Aquarius, a sun-like star is dying. ... During the Shelios Expedition to Greenland in late August, even veteran sky enthusiasts saw auroras so colorful, so fast changing, and so unusual in form that they could remember nothing like it. ...