Attn: Nick Jr.

Now Steve / Joe will need to change the words to "The Planet Song."

Pluto Loses Status as a Planet

Pluto's status has been contested for many years as it is further away and considerably smaller than the eight other planets in our Solar System.

Its orbit around the Sun is also highly inclined to the plane of the big planets in the Solar System.

In addition, since the early 1990s, astronomers have found several objects of comparable size to Pluto in an outer region of the Solar System called the Kuiper Belt.

Some astronomers have long argued that Pluto belongs with this population of small, icy "dwarf planets", not with the objects we call planets.

The whole article is cool.