Astronomers using NASA’s Chandra space observatory have discovered enormous arms of X-ray emitting plasma in the Coma cluster of galaxies. This composite image shows enormous arms of plasma in the Coma galaxy cluster. Image credit: X-ray – NASA / CXC / MPE / J. Sanders et al.; optical – SDSS. Coma is an unusual galaxy cluster because it contains not one, but two giant elliptical galaxies near its center. These galaxies are probably the...
