kenapa langit malam gelap?

jangan dulu takut, artikelnya gue terjemahin kok ke bahasa indonesia.

"Let’s talk about the dark night. Yes this post is about Batman.

Our common assumption is that the night sky is supposed to be dark with only few dots of light.

But then, aren’t there supposed to billions upon billions of stars in the night sky emitting light. Yes, they are very far away, but, there is nothing stopping (like air or glass) the light from reaching us. So, shouldn’t all those stars make the night sky (very) bright and not dark ?

This is actually called Olbers’ Paradox. 

Let’s look at the problem in another way. We can divide the universe into a series of concentric shells, being 5 light years thick. Thus, a certain number of stars will be in the shell 1,00,000 to 1,00,005 light years away. If the universe is homogeneous at a large scale (i.e., static), then there would be four times as many stars in a second shell between 2,00,000 to 2,00,005 light years away.