Is demoted planet Pluto making a come back?

Pluto was discovered by the astronomer Clyde Tombaugh at the Lowell Observatory in Flagstaff, Arizona, on Febrary 18, 1930, and it was the ninth planet in our solar system.Then, in 2006 the International Astronomical Union, the group that gets to name planetary bodies, came up with some rules for what is and is not a planet. As a result, Pluto is not considered anymore as a planet, because it's too small to knock other space rocks out of its path as it orbits the sun.

The group's definitions sparked lots od debate. On September 18th the Harvard-Smithsonian Center for Astrophysics jumped into a debate, where some experts discussed the definition of a planet. They voted that Pluto as "the smallest spherical lump of matter that formed around stars or stellar remnants" is a planet. Also, if you put Earth where Pluto is, it would be excluded according to IAU rules.

What we used to know about the number and variety of planets was very data limited before the 21st century. Now we know that there are lots of types of planets. At present, a spacecraft is directed to Pluto: the New Horizons. Within 7 weeks we'll have much more information about Pluto, and it will finally come into focus.