Let's think now about the concept of motion and in particular, the idea of speed. What is speed? Well, let's think about an example. Let's say that you're going to go from home to school, and school ...
There are also moons in the solar system, that is objects orbiting around the planets. In fact just over 180 moons at the last count. And some of those moons are so large that if they were orbiting ...
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