... Comet and Aurora Over Alaska . ... Although the aurora faded in minutes, the comet is just now beginning to fade. ... A fantastic jumble of young blue star clusters, gigantic glowing gas clouds, and imposing dark dust lanes surrounds the central region of the active galaxy Centaurus A. This mosaic of Hubble Space Telescope images taken in blue, green, and red light has been processed to present a natural color picture of this cosmic maelstrom. ... The Old Moon in the New Moon's Arms . ...