Watch the Royal Observatory Answer Some Complicated Questions About Space

By Jesus Diaz on at

The Royal Observatory of Greenwich has crafted three simple animations to explain three very complex things: what's inside a black hole? how do we know the age of the sun?—did you know 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?