On Thursday, February 11th, it crossed back out, recovering its status as the most distant of nine planets . Pluto is still considered to be a planet, although very little is known about it compared to other planets. Pluto is smaller than any other planet and even smaller than several other planet's moons. Pluto is probably composed of frozen rock and ice, much like Neptune's moon Triton . Pluto has not yet been visited by a spacecraft, but a mission is being planned for the next decade.
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