Planetary Bodies
 
 
Neptune and its moon See also
A geyser on Triton, largest satellite of Neptune
The ice giant Neptune seen from the surface of its largest satellite, Triton.
Triton Doom (1998)  Triton, largest moon of Neptune, is doomed. Its irregular orbit is taking it inexorably closer to its parent planet. At a time in the future too distant for humans to comprehend, the moon will have come so close to Neptune that the gravity of this immense planet, four times the diameter of the Earth, will begin to tear the moon to pieces.