Across
- 1. whats a doughnut-shaped ring of icy objects around the Sun, extending just beyond the orbit of Neptune
- 7. planets that have a compact, rocky surface like Earth's terra firma
- 9. what occurs in the night sky when the Earth passes through the path of debris left behind by a comet
- 10. what is a large objects made of dust and ice that orbit the Sun.
- 14. what is an APPARENT change in the movement of the planet through the sky
- 16. rocks that have been injected as meter-sized objects into the Earth's orbit following collisions on their parent bodies.
- 18. a measure of how much the deviation of the curve has occurred from the circularity of the given shape.
Down
- 2. what is a fundamental system in condensed matter sciences and the main constituent of gas giant planets
- 3. a rock from space that is traveling through Earth's atmosphere.
- 4. the average distance between Earth and the Sun,
- 5. a steep slope
- 6. what type of rock that has crashed into Earth from outside the atmosphere
- 8. what is a area around a star where it is not too hot and not too cold for liquid water to exist on the surface of surrounding planets.
- 11. the locus of all those points in a plane such that the sum of their distances from two fixed points in the plane, is constant
- 12. what type of planet is a large planet mostly composed of helium and/or hydrogen
- 13. what type of planet is pluto
- 15. a solid object arising during the accumulation of orbiting bodies whose internal strength is dominated by self-gravity and whose orbital dynamics is not significantly affected by gas drag.
- 17. is a region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun.