Scientists have discovered a new minor planet orbiting our sun between Neptune and Pluto. The object, about a quarter of the size of Pluto, is larger than most known asteroids, but too small to be considered a regular planet.
There are thousands of other "minor planets" in our solar system, but this new one, called 2000 EB173, is the second largest to be discovered. Ceres, located between Mars and Jupiter, is the largest.
EB173 is part of a cluster of icy objects called the Kuiper Belt. Scientists believe that this may be left over remains of the material that originally formed the solar system.