Why is Pluto no longer a Planet?

You all would know that we have 8 planets in our Solar System. But you will get shocked by the fact that until 2005 we had 9 planets in our Solar System namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.

Now you must be wondering that where did Pluto went off after 2005. Let me clear it to you that Pluto did not go any where. But it became a dwarf planet. After reading this, many of you must be thinking that, what does that mean? The explanation to this is that to become a planet in our solar system, the planet should satisfy three condition. Before telling the three criteria, let me tell you about the information of Pluto.

Pluto was discovered in 1930 by an American astronomer Clyde Tombaugh. It was one of the most important discovery at that time. But at that time we did not have advanced tools to check weather it satisfy all the conditions. But in August 2006 it was declared as a dwarf Planet.

Now, the three criteria. The first condition is that it should revolve around the Sun . The second condition was that it should be a sphere. Now you must be think that isn't Pluto a Sphere and doesn't it revolve around the sun. The answer is yes, it satisfy the first two condition. But the Third condition states that it should destroy the things on its path. this meant that it should destroy the asteroids in it way by its gravitation force. This was the only condition that was not satisfied bu Pluto. Thus it became to be known as a Dwarf Planet.

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