麻豆传媒

These graphics include a composite image that shows s X-rays from NASA鈥檚 Chandra X-ray Observatory (in magenta), optical light data from NASA鈥檚 Hubble Space Telescope (orange, light blue), infrared data from the European Southern Observatory (represented in gold, dark blue), and ultraviolet data from NASA鈥檚 GALEX (shown in purple) of the Helix Nebula. At the center of the Helix is a white dwarf, the dim star that remains after the star has shed its outer layers. New data from Chandra indicates that this white dwarf has destroyed an orbiting planet, as depicted in the artist鈥檚 concept below. This would explain a mysterious signal in X-rays that astronomers have detected for decades.