This is an informative video from Peter Schmiedchen of What If? detailing how many Earths could fit inside the planets in our solar system that are larger than Earth, and how many of Earth’s moons could fit inside the planets that are smaller than Earth. I learned a lot by watching. Mostly, that a bunch of Earths and moons packed together look like little candies and I want to eat them all. Science! Also, flat-Earthers disagree with your numbers.