Black Holes
a
a
a
Enter Category

100

WHAT'S A BLACK HOLE

A hole where no item can escape from including light.

100

a

a

100

a

a

100

a

a

100

b

b

200

How far away is a black hole?

200

a

a

200

a

a

200

a

a

200

b

b

300

a

a

300

a

a

300

aa

a

300

a

a

300

b

b

400

a

a

400

a

a

400

a

a

400

a

a

400

a

a

500

a

a

500

a

a

500

a

a

500

a

a

500

a