Everyone knows that the Moon revolves in orbit around the Earth. But how do we really know this? Can we see the Moon move? Can we measure it? You may have also been told that the Moon’s motion has something to do with the lunar phases, but how can we understand that if we don’t really even know how the Moon moves through space?
It turns out that the Moon does indeed circle the Earth once every 28 days or so just as you’ve been told in science class, but you don’t have to take your teacher's or textbook's word for this. You can see and measure it yourself!