* Darkness is relative: Night is our perception of darkness, but it's not the absolute darkest thing.

* Space is much darker: The vastness of outer space is far darker than even the darkest night. There's no light from the sun or other stars in many parts of space.

* Black holes are the ultimate darkness: Black holes are so dense that even light can't escape them. They are the closest thing to absolute darkness we know of.

So, while "night" is the darkness we experience on Earth, it's not the most dark thing in the universe.