... NGC 2818 is a beautiful planetary nebula, the gaseous shroud of a dying sun-like star. ... The expanding debris cloud from the stellar explosion, found in the southerly constellation of Lupus, still puts on a cosmic light show across the electromagnetic spectrum. ... Why would a cloud appear to be different colors? A relatively rare phenomenon known as iridescent clouds can show unusual colors vividly or a whole spectrum of colors simultaneously. ... J1502 1115: A Triple Black Hole Galaxy . ...