Every person, planet, star and galaxy is part of the Universe — and even every empty space! The Universe is the biggest thing we have a word for.
Amazing! The Universe is too big to measure in kilometres. Even if you could travel at the speed of light, it would take at least 15 billion years to cross it – as far as we know!
What’s outside the Universe?
It’s impossible to say. Scientists are still trying to guess, by using clues left behind from the birth of our Universe. They are pretty sure there would be no time, distance or things there.
Where are we in the Universe?
People once thought Earth was at the centre of the Universe. Now we know Earth is one of many planets moving through space. It’s hard to tell where we are because we can’t see the Universe’s edges.
Is it true? There are more stars than people.
Yes. As a rough guess, scientists think that there are about 1.8 million million stars for every human being alive in the world today.
Picture Credit : Google