And now Grandpa John tells a bedtime story
about two black holes colliding.
Once there were two black holes.
What’s a black hole?
A black hole is a thing in space
that’s huge, but you can’t see it, and
it pulls everything in around it.
What??
There were two black holes.
They were brothers.
And they were very big and strong, about thirty
times the mass of the sun!
“I’m stronger than you!” said one black
hole as it gobbled up a star!
“No, I’M stronger than YOU,” said the
other black hole as it gobbled up another star.
Then they started to wrestle, and spin around
and around and faster and faster, until…
Bonk!
They collided!
But instead of collapsing, they became one
big, supermassive black hole at the center
of the galaxy!
They were stronger than ever when they came
together!
Then they released a big wave of energy fifty
times more than all the stars we can see!
Whoah!
And this wave flew across the galaxy and we
detected it as a sound all the way down here
on earth.
And you know what it sounded like?
What?
Boop!
Boop!
Yep, this happy little “boop” sound.
That’s what it sounded like.
The end!
I’m hungry.
