One clear night, Anna looked up at the sky and saw thousands of bright stars. She wondered what it would be like to travel into space. Her biggest dream was to become an astronaut. Anna often read books about planets, galaxies, and black holes. She learned that the universe is much bigger than we can imagine. One day, she saw a shining comet moving across the dark sky. It made her feel excited and curious about the mysteries of space. She imagined herself flying in a spaceship among the stars. I