Across
- 3. Mercury,Venus,Earth,Mars
- 6. The only planet with visible rings
- 7. The 4th planet from the sun
- 9. A comet that is composed of dust and rock particles
- 10. The darkest portion of the Moon's shadow
Down
- 1. A black hole has an event horizon where nothing can escape
- 2. The biggest planet in our solar system
- 4. Areas of the Sun's surface that appear dark
- 5. The place where people can go to learn about objects in space
- 8. The only planet to support life