Illustration of the Solar System from an oblique angle, in the far future, after the Sun has become a white dwarf. Most of the inner planets are gone, with only Mars certain to remain after the Sun's red giant phases. The outer planets, meanwhile, having moved farther out in their orbits due to the central star now having lost much of its mass, are losing their atmospheres due to the intense ultraviolet radiation from the central white dwarf. They form long, comet-like tails radiating outward from the dead stellar core. Some of this gas leaks inwards and surrounds the white dwarf in a tenuous disc.