Across
- 3. the planet most like Earth
- 4. known as the "ringed planet"
- 7. unmanned research spacecraft sent beyond Earth's orbit
- 8. the first man on the moon, Neil ____
- 9. the surface of the sun
- 11. the outermost part of the sun
- 12. any object that orbits another object in space
Down
- 1. the sun's atmosphere
- 2. planet that has the Great Red Spot
- 5. brightest object in the morning and evening skies
- 6. each orbit that a planet makes around the sun
- 10. able to sustain life