geoscience crossword

5. a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
7. celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky
10. small body moving fast through out the solar system
13. made up of Earth venus mars and mercury
15. a minute planet; a body that could or did come together with many others under gravitation to form a planet.
17. solid piece of rock that makes it through the earths atmosphere and hit earth
18. regions where the gas in Jupiter's atmosphere is sinking downwards

1. small body that gets into the atmosphere and burns up
2. a steep slope or cliff formed by folded or eroded layers of rock
3. The wide equatorial zone is visible in the center surrounded by two dark equatorial belts
4. fundamental system in condensed matter sciences and the main constituent of gas giant planets
6. icy, small Solar System body that warms and begins to release gases when passing close to the Sun
8. astronomy, actual or apparent motion of a body in a direction opposite to that of the direct motions of most members of the solar system
9. small celestial body not big enough to be a planet
11. circumstellar disc in the outer Solar System
12. made up of Jupiter Saturn Uranus and Neptune
14. A measure of the deviation of an elliptical path, especially an orbit, from a perfect circle
16. a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points