Dwarf Planets and The Pain of Pluto

We've all heard Pluto was removed from its classification as a planet, and some of us felt sad, mainly because it has the name of a cute go
lden retriever, but let's know why exactly that happened.

In 2006, the International Astronomical Union decided that for a body to be classified as a planet, there are three conditions:

1. It must orbit the sun.

2. It should be shaped by its own gravity and not by external factors.

3. It should clear the neighborhood around its orbit. 

Pluto unfortunately does not meet the last condition. There are many objects in the path of its orbit, and pluto is not big enough to influence them. It actually has more in common with comets than it does with planets. Hence, it was termed a dwarf planet. 

Similarly, any object that meets the first two conditions but not the third one is termed a dwarf planet, seven of which have been discovered so far. Dwarf planets can have moons, pluto has five of them, and they're actually very interesting celestial bodies, which is why I personally don't think Pluto was demoted.