There's a young unicorn who lives on a planet, who lives near a star, who lives in a galaxy filled with billions of others stars.
The galaxy lives in a universe with billions of other galaxies,
And the universe lives, well, we can't see that far.

Ponies on this planet think what they see is everything. Oblivious of the true vastness of the space up above. Space that is full of nature on the astronomical scales, wonder, color, light, death, destruction, extinction, rebirth and "life".

This young unicorn sees the wonder of it all, and he's willing to share it with everypony.
He is affectionally known as Kosmos.