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Today, Pluto is called a dwarf planet. A dwarf planet is round and orbits the sun just like the eight major planets. But unlike a planet, a dwarf planet does not have enough gravity to attract all of the space dust and tiny objects in its path.A dwarf planet also is much smaller than a planet, but it is not a moon.n 2006, NASA launched New Horizons, which is the first mission to Pluto. New Horizons is a spacecraft about the size of a piano that is flying to the outer edge of the solar system. The spacecraft will take nine years to reach Pluto. In 2015, New Horizons will spend more than five months studying Pluto and its moons.
Pluto has a diameter of 1,430 miles, which is six times less than that of Earth. Pluto is smaller than the Earth's moon. In 2006, Pluto was stripped of its status as one of the Solar System's nine planets, and given a new label as the largest dwarf planet.. Continue Reading.