A little girl always looked up at the moon in the sky. She wondered why it changed shape and why it was so far away. She decided to ask her teacher. Her teacher explained that the moon was a large rock that traveled around the Earth. As it moved, the sun shone on different parts of it, creating the different shapes that we saw in the sky. The little girl was fascinated and wanted to learn more about the moon. She went to the library and checked out books about space and the moon. She learned that the moon was the Earth's only natural satellite and that it was important for many things, like controlling the tides and providing light at night.