Why the sky is dark at night... it's not what you think

In honor of the recent passing of Sir Patrick Moore (at 89 years old), I bring you a great little animation as to why the sky is dark at night. Worth watching (and sharing with your children), and I bet it is not what you expected.

Wow, so the 'Kessler Effect' is pretty damn serious!

R.I.P. Sit Patrick Moore