The Universe spans a diameter of over 150 billion
light years and is 13.7 billion years old...

...containing approximately 100,000,000,000,000,000,000,000 stars, and there are probably more planets than stars.

It is still unknown why, but there
is a supermassive black hole at
the heart of every galaxy.

There is no such thing as the Universe’s center since every galaxy is expanding away from one another.

Almost all of ordinary matter
(99.9999999% of it) is empty space.
If you took out all of the space
in our atoms, the entire human race
(all 7 billion of us) would fit into
the volume of a sugar cube.

Many of the atoms you're made of, from the calcium in your bones to the iron in your blood, were brewed up in the heart of an exploding star billions of years ago.