I took Astronomy to meet my science requisite for my general education credits in college (I went to a 2 year college in my early 20s while I was still in). I thought it would be all about planets and stars. It was mostly math.
We learned of Kepler and how he discovered several planets in our solar system without even seeing them. His equations dealing with the orbit of a large celestial math and how they interact with each other led to his proving Jupiter, Saturn, and other planets existed.
Years later I read something that dealt with the Great Flood of Noah's Day. It showed how much water was needed to cover the highest peaks on Earth. Based on the increased mass due to the water required and Kepler's equations, I knew it was scientifically impossible for the Flood to have taken place. It would have changed the Earth's orbit and the orbits of the other planets in our solar system.