... CXC , NASA . Optical: Y.Chu ( U. Illinois ), STScI , NASA . ... Radio (red) and optical emission (green) are brighter near the central regions where the x-rays seem to be absorbed by denser, cooler material on the side of the expanding debris cloud facing the Earth. ... The intriguing image is a composite of x-ray data from the orbiting Chandra Observatory , optical data from the Hubble Space Telescope , and radio from the Australia Telescope Compact Array . ... NASA Official: Jay Norris. ...