Space Adventure!

4. The first planet discovered by a telescope.
8. When Neil Armstrong landed upon it's surface he said, "One small step for man, one giant leap for mankind."
9. Has 67 moons.
11. Closest planet to the sun.
13. A person trained by a spaceflight program to lead, pilot or be a crew member of an expedition to space on a spacecraft.
14. Has five rings.
15. The brightest planet in the solar system.
18. the attractive force that all objects exert on one another.
19. A massive, bright, sphere of very hot gas called plasma which is held together by its own gravity.

1. A green creature, with two antennas and five eyes which live on Mars.
2. No longer considered a planet.
3. An enormous gravitationally bound assemblage of millions or billions of stars.
5. The second largest planet in the solar system.
6. The third planet from the sun.
7. A theoretical passage through space-time that could create shortcuts for long journeys across the universe.
10. Without these, travelling into space would be impossible
12. Are small Solar System bodies that orbit the Sun and are often called minor planets.
16. The star at the centre of our solar system.
17. Named after the roman God of war.