Suddenly, he discovers a comet. Using what you know about how we determine the motions of objects in the sky, argue that this scene is completely bogus. Draw an H-R diagram. During the formation of the solar system, two laws of physics were acting which caused the shape that exists today. Describe the life cycle of a star.
Stars evolve because their chemical composition changes.
You are quite happy to go someplace sunny and warm, so you hop on the plane, and head to Turkey, where Dr. Jones is waiting to lead you to the site. They believe that the site is of religious significance, since there are stones aligned to bracket the Sun at the equinoxes, and a pair of tall stones aligned so that you can sight along them and locate the North Star. You check this out for yourself, and using your compass, find that the equinox stones are indeed aligned perpendicularly to your compass needle. Examining the rocks, you find a diagram inscribed on one of them that shows a familiar pattern of dots. On a hunch, you take a piece of paper, and trace the pattern, making holes at each of the dots.