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How Big Is The Universe- Explained in a Way You Will Easily Understand

The Royal Observatory of Greenwich, England, has created three simple simulations to describe three very difficult things: What's inside a black hole, how do we tell the age of our sun—did you know the weight of Sun is 4,000 trillion trillion hippopotamuses?, and how large is the Universe.

How Do We Know How Old The Sun Is?


What's inside a black hole?


How Big Is The Universe?

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