Space

12345678910
Across
  1. 2. Which planet is known as the "Red Planet"
  2. 4. What is the hottest planet in our solar system
  3. 5. What is Earth's natural satellite
  4. 7. How many planets are in our solar system
  5. 8. What is the farthest spacecraft humans have launched
  6. 10. How many asteroid belts are our solar system
Down
  1. 1. What is the closest galaxy to ours
  2. 3. What is the biggest planet in our solar system
  3. 6. What was the first person to walk on the Moon
  4. 9. What keeps the planets from flying away from the Sun