What Is a Dwarf Planet?

The solar system has many objects, including the Sun, planets, moons, and asteroids. In 2006, scientists created a new group called dwarf planets. These objects are smaller than regular planets, but bigger than most asteroids.

A dwarf planet is a round object that orbits the Sun, just like a planet. However, it is not big enough to clear its path of other space rocks. This means it might share its orbit with other objects. A regular planet, like Earth, is large enough to pull in or push away nearby objects using its gravity. Dwarf planets do not have enough gravity to do this.

One famous dwarf planet is Pluto. For many years, Pluto was called the ninth planet. Scientists discovered that Pluto is much smaller than the other planets and shares its orbit with other icy objects. Because of this, Pluto is now called a dwarf planet.

There are other dwarf planets in our solar system. Ceres is found in the asteroid belt between Mars and Jupiter. Eris is another dwarf planet that is even farther from the Sun than Pluto. Scientists have found more dwarf planets and think there may be hundreds more waiting to be discovered.

Dwarf planets help us understand how the solar system formed. By studying them, scientists learn about the history of space and how planets grow and change over time. New technology, like powerful telescopes, helps us find and study these distant worlds.

Interesting Fact: The largest dwarf planet in our solar system is called Eris, and it is even farther from the Sun than Pluto!