Why is space black? Maybe someone forgot to pay the electricity bill? Not so!
Outer space is dark and black because our universe is expanding.
Our sun is a giant star. The amount of light it emits is enormous. The universe is full of stars that shine like the Sun, so many that it’s almost impossible to count them all. With so many stars, space should be lit up, right? Exactly!
However, that is not the case!
Research shows that space is dark and black because our universe is expanding. This expansion causes the visible light emitted by the stars to stretch and to a certain distance they are no longer observable.
When no visible light is detected, we will see space in the dark. Moreover, light has a certain speed limit, while the universe is extremely large. So light from distant stars can’t even reach our eyes. Therefore, space is dark.