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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.
Any object that doesnât meet this 3rd criteria is considered a dwarf planet. And so, Pluto is a dwarf planet. There are still many objects with similar size and mass to Pluto jostling around in its orbit.And until Pluto crashes into many of them and gains mass, it will remain a dwarf planet.Eris suffers from the same problem.stronomers estimate that there are at least 70,000 icy objects, with the same composition as Pluto, that measure 100 km across or more in the Kuiper Belt. And according to the new rules, Pluto is not a planet.