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The largest to smallest
Transcript of The largest to smallest
...through the brain of Mr. G.
The biggest thing we know is the Universe. Nobody knows exactly how big it is, at least 91 billion light-years. The Universe is 13.7 billion years old.
There are about 100 billion galaxies in it.
Our galaxy: the Milky Way
200–400 billion stars are in the Milky Way, and it is 100 000
We call it Milky Way because from the Earth it looks like "milky" glowing something arching across the night sky.
Our Solar System
It is about 4 503 billion km, and it is 4.5 billion years old.
Our lovely Earth...
...where we live!
On Earth, there are continents
But Where is Mr. G.?!?
Mr. G. is in the classroom, and in his head there is a brain!
The brain consists of neurons.
Mr. G's brain has about 100 billion neurons, and one neuron is 0.1 millimeter.
The middle of a neuron is a nucleus.
The size of a nucleus is
So, there is a small ball inside the nucleus, called nucleolus.
It is 0.001 mm.
The nucleolus made of atoms!
You know, like
oxygen, hydrogen, carbon, iron, helium...
1 mm divided by 10 000 000.
Do you remember where the atoms were born?!?
Somewhere in the Universe, somewhere in a Star!
Atoms were born long-long time ago, some billion years ago
So, then, hmmm...
...how old is Mr. G.?