What did Newton understand that was such a revolution? Can someone just... explain gravity to me? Let's start with a ...

Well, it wouldn't be pretty. Imagine the Moon's identical twin comes hurtling by and is trapped by Earth's gravity. As it settles into orbit, halfway between Earth and our original moon ...

The weight of the apple is 1N Weight is the size ... is not the same everywhere – the force of gravity is less on the moon than on the Earth, so, the weight of the object is less on the moon ...

The short answer is that you would weigh roughly one-sixth your Earth weight on the Moon. So if your bathroom ... equation for figuring out the force of gravity almost 350 years ago.