Across
- 2. Great dark spot
- 3. small body of matter from outer space that enter Earth's atmosphere
- 4. the "Red Planet"
- 8. shape of a comet's orbit
- 9. planets mostly made up up gas
- 12. center of the solar system and causes planets to orbit
- 13. the envelope of gases surrounding the Earth or another planet
- 15. hottest planet
- 18. natural body outside Earth's atmosphere
- 20. celestial body moving in an elliptical orbit around a star
- 22. the spinning of a planet on its axis
- 23. region beyond the planet system containing comets, asteroids, and other small bodies of
- 24. the largest planet
- 26. four largest mostly visible moons of Jupiter; Io, Europa, Ganymede and Callisto
- 28. action of one object coming forcibly into contact with another
- 29. the elliptical path of the planets
Down
- 1. period of time it takes a planet to go around the sun
- 4. meteor that survives Earth's atmosphere and lands on the ground
- 5. resistance an object encounters when moving over another
- 6. a large, bowl shaped cavity in the ground or surface caused by a meteorite
- 7. sperical shell of cometary bodies surrounding the sun the Sun beyond the outermost planets
- 8. of or from outside the Earth
- 10. also called terrestrial planets
- 11. natural force of attraction exerted by one object on an another object
- 14. small, rapidly moving meteor burning up in Earth's atmosphere
- 16. another word for a moon orbiting a planet
- 17. 2/3 surface covered by water
- 19. gas planet with visible rings
- 21. made up of a nucleus of ice and dust
- 25. Axis tilted on its side
- 27. closest planet to the sun