Across
- 3. in 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
- 5. also known as space junk, space pollution, space waste, space trash, space garbage, or cosmic debris
- 8. cloud structures on jupiter
- 12. When a meteoroid survives a trip through the atmosphere and hits the ground
- 15. telluric planet, or rocky planet, is a planet that is composed primarily of silicate rocks or metals
- 16. a region or area set off as distinct from surrounding or adjoining parts
- 17. 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.
- 18. a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points
Down
- 1. a small body moving in the solar system
- 2. icy, small Solar System body that warms and begins to release gases when passing close to the Sun
- 4. a celestial body resembling a small planet
- 6. a celestial event in which a number of meteors are observed to radiate
- 7. is a large planet mostly composed of helium and/or hydrogen. These planets, like Jupiter and Saturn
- 9. doughnut-shaped region of icy objects beyond the orbit of Neptune
- 10. a minute planet; a body that could or did come together with many others under gravitation to form a planet
- 11. a fundamental system in condensed matter sciences and the main constituent of gas giant planets
- 13. deviation of a curve or orbit from circularity.
- 14. a small body of matter from outer space that enters the earth's atmosphere