X-ray & Optical Images of Pluto
The first detection of Pluto in X-rays has been made using Chandra in conjunction with observations from the New Horizon spacecraft as it approached and then flew by the dwarf planet in 2015. During four observations, Chandra detected low-energy X-rays from the small planet due to interactions between Pluto's atmosphere and a wind of particles from the Sun. The optical image was taken from New Horizons on its approach to Pluto, while the X-ray image of Pluto is from Chandra (not to the same scale). This result offers new insight into the environment surrounding the largest and best-known object in the Solar System's outermost regions.
(Credit: X-ray: NASA/CXC/JHUAPL/R.McNutt et al; Optical: NASA/JHUAPL)