NASA's Chandra X-Ray Observatory, designed to observe X-rays from high energy regions of the universe, regularly releases images taken using the Advanced CCD Imaging Spectrometer (ACIS). This image reveals a bright central star surrounded by a cloud of multimillion-degree gas in the Cat's Eye nebula. The image is accompanied by a table giving the scale, category, coordinates, observation date and...

NASA's Chandra X-Ray Observatory, designed to observe X-rays from high energy regions of the universe, regularly releases images taken using the Advanced CCD Imaging Spectrometer (ACIS). This image is animated to show the twinkling of the Orion Nebula, one of the closest star-forming regions to Earth (AVI). The image is accompanied by a table giving the scale, category, coordinates, observation...