Einstein once said that if you can’t explain it simply, you don’t understand it. Well with that in mind I wanted to explain gravity for anyone interested but aimed at kids, hence the drawings!
Meet Newton, this guy had a great idea one day when an apple hit him in the head, well not really, but that is how the story goes.
He came up with a set of equations [fancy term for math!] that you could use to figure out how fast something would fall and a lot of other really cool stuff involving gravity. But even though he knew it worked, he had no idea why it worked.
Then a long time later Einstein came into the picture and had a great idea! He came up with the idea that space [the fabric of space as it is called] bends!
Without any planets on space [as seen above] there is no bending.
But the second we add any planet or sun to the mix space bent.
It turns out that this theory was proved to be correct! Space actually bends when we add things to it [even you! But just a teeny tiny bit].
The earth travels around the sun at a really huge speed [67,062 miles per hour! Now that is fast!!!] so it doesn’t get pulled into the sun and sort of works like this:
The coin will travel around the funnel and eventually get to the center, if you ever used one you know what this looks like. But because space has no friction, it doesn’t slow down!
This is why we don’t fall into the sun! We are constantly falling towards the sun but we never fall into it, this is why our orbit around the sun is not perfectly circular. And why things fall in general so next time you drop something, just remember gravity!