Helix Nebula, one of the closest planetary nebulae to our solar system with a white dwarf inside captured by Spitzer Space Telescope (green and red), Hubble Space Telescope(orange and blue), Galaxy Evolution Explorer (cyan), and Chandra X-ray Observatory. Image credit: X-ray: NASA/CXC; Ultraviolet: NASA/JPL-Caltech/SSC; Optical: NASA/STScI(M. Meixner)/ESA/NRAO(T.A. Rector); Infrared: NASA/JPL-Caltech/K. Su
