Across
- 6. The form of hydrogen with both liquid and metallic properties that exists as a layer in the Jovian atmosphere.
- 7. Rocky-surfaced, small, and dense inner planets closest to the Sun.
- 9. The low, warm, dark-colored cloud that sinks and flows rapidly in the Jovian atmosphere.
- 10. Space objects built of solid particles that can form planets through collisions and mergers.
- 12. It occurs when Earth intersects a cometary orbit and comet particles burn up as they enter Earth's upper atmosphere.
- 15. A piece of interplanetary material that falls toward Earth and enters its atmosphere.
- 16. Large, gaseous planet's that are very cold at its surface; has ring systems, many moons, and lacks solid surfaces.
- 17. The average distance between the Sun and Earth.
Down
- 1. A streak of light produced when a meteoroid falls toward Earth and burns up in Earth's atmosphere.
- 2. An object that,is not a satellite,and is spherical in shape, but due to its own gravity, orbits the Sun, and has not cleared the area of its orbit of smaller debris.
- 3. An oval that is centered on two points or the shape of planets' orbits.
- 4. A planet's backward movement in the sky.
- 5. The small solar system bodies that are mostly rock and ice, and lies outside the orbit of Neptune,
- 8. Cliff's on Mercury.
- 11. The high, cool, light-colored cloud that rises and flows rapidly in the Jovian atmosphere.
- 13. The ratio of the distance between the foci to the length of the major axis.
- 14. A small frag- ment of an orbiting body that has fallen to Earth, generating heat.