My nephew Aniruddha is very fond of astronomy.
He is aware of new updates on astronomy.
I am always ready to cross question him !!!!
I asked him one question,
Why Pluto is considered as a dwarf planet instead of a planet ???
Aniruddha : There are some standards to be fulfilled by a celestial body to be a planet.
Pluto dont satisfy them. Thats why Pluto is not a planet !!!!
Me : Which was the condition that Pluto didn't satisfy ???
Aniruddha : Pluto don't have its own orbit to circulate around Sun.
It uses Neptune's orbit !!!!
This was new thing to me.
Me : If Pluto is using Neptune's orbit , there is a possibility that they may collide with each other.......
Aniruddha : Since billions of years, it is happening. Both of them didn't collide !!!!
So, in future also , both of them may not collide with each other.
You don't worry.......!!!!!
Listening to that, I changed the topic of discussion..........