The Royal Observatory of Greenwich , England , has crafted three simple animations to explain three very complex thing : What ’s inside a mordant jam , how do we know the age of the sun — did you have sex the Sun weighs 4,000 trillion trillion hippopotamuses?—and how big is the Universe .
What’s inside a black hole?
How Do We Know How Old The Sun Is?
How Big Is The Universe?
Big BangDark energySpace
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