Solar System

5. the planet eighth in order from the Sun
6. the name often given to the four inner planets
10. the collection of eight planets and their moons in orbit around the sun
11. a celestial body moving in an elliptical orbit around a star
13. the planet closest to the sun and one of the hottest planets
14. the name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
15. a force that moves rocks and other materials; the force that pulls objects toward each other

1. a celestial body resembling a small planet but lacking certain technical criteria
2. a planet whose orbit lies outside the asteroid belt
3. a planet whose orbit lies within the asteroid belt
4. the path of an object as it revolves around another object in space
7. a unit of measurement equal to 149.6 million kilometers
8. between the orbits of Mars and Jupiter, where many asteroids are found
9. an oval shape, which may be elongated or nearly circular
12. the fourth planet in order from the Sun