It is not a mystery in our current age why the sky is dark in the night , however back in the 20th century the things were quite messy but why people couldn't find the reason untill 20th century ?

![](https://steemitimages.com/DQmNWC39aJEuPjDAwZyuNePhJ3wHqmw4Q3PqNZEEnTGEXQG/image.png)

#### Why ?

![](https://steemitimages.com/DQmX4TsMDLuTnpXk1KSAvB1BuveC1RoqYbFe5cBpambkDT1/image.png)

Because the guessed reason for this phenemonen was not really simple as guessed. In the traditional way of universe we thought that universe was something limitless and static , however this assumption brought some question with itself.If the universe was static and limitless I mean if there aren't any start point for universe when we look to the sky we need to see some stars in some points ,therefore the night should be as bright as day , because we have enough light source to create this brigtness in the universe but the night was quite dark when we think these circumstances.


The solution to this paradox found with the discovery about the concept of universe , unlike the static universe idea we found out that it is pretty much dinamic and expanding. The reason why universe is dark at the sky is the starting point of the universe. Therefore most of the light of the stars still didn't reach to us if the universe was there since infinity we should have enough time to get all the light from all the light sources sofar. Eventually night should have been bright as day.

Our universe is 14 billion years old and even we observe with the current most developed devices we can't see anything that is further than 14 billion light years away to us. Because the light didn't complete its travel to us. When we consider that our universe is expanding we may say that the distance between anything will increase.

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#### <center>Thanks for Reading & See You Soon !</center>