Gravity pulls things together. So why doesn’t the Earth crash into the Sun…and the Moon into the Earth?
This may be one of those questions you’ve asked an elementary, middle-school, high-school, and/or college teacher about…and the answer, if you got one, always seemed a little muddy or confused. Basically, I was never given a good answer either. It took two years of college mathematics and physics before I understood it on my own. As always, I’m going to try and do better here.
Let’s start with what we know: The Earth IS moving around the sun right now. So, the entire Earth as one object has a speed and a direction.
