Where did the Big Bang take place? If the Universe is expanding, where is it expanding from? These are very good questions, but the answer might seem confusing. The answer is...everywhere!

It is all in the dimensions!

One of the biggest questions in science is "What will happen to the Universe"?

Astronomers think the Big Bang is the best way to explain how the Universe started and how it changed over time. All science is based on evidence. So what is the evidence for the Big Bang?

The Big Bang is the explanation for how the Universe started. Astronomers think that everything started in a single point. Then everything expanded and stretched to grow into the huge Universe we see today. 

Most galaxies appear to be moving away from us. This means that the light from them is "stretched" slightly and appears a bit redder than it would otherwise do.

This is similar to what happens to sound. Imagine that a fire engine is driving past you with its siren on. When it is moving towards you, the siren it quite high-pitched. When it is moving away from you, the pitch drops, and it sounds lower. With light, "lower" means more red and "higher" means more blue.