Inner & Outer Planets Vocab

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Across
  1. 2. the critical distance in astronomy within which a celestial body held together only by its own gravity will disintegrate due to a larger body's tidal forces.
  2. 3. a flat, disk-like structure of countless small particles (dust, ice, rock, moonlets) orbiting a celestial body
  3. 4. Jupiter's largest moon
  4. 8. a colossal volcano on mars largest volcano and tallest mountain in the solar system
  5. 9. 4 largest moons on jupiter
  6. 11. an active technique in astronomy that bounces radio waves or microwaves off nearby solar system objects
  7. 12. a long steep slope or cliff on a planetary surface
  8. 13. a large , continent-sized highland region in the northern hemisphere of venus
  9. 15. largest moon on Saturn
  10. 16. a rocky, Earth-like planet with a solid surface, primarily composed of silicate rocks and metals
  11. 17. the Greek god personification of fear and panic/ larger, inner moon of mars
  12. 18. the largest impact basin on mars
Down
  1. 1. the four large, outer planets of our solar system—Jupiter, Saturn, Uranus, and Neptune
  2. 5. the process where a molecule breaks apart into smaller atoms or fragments after absorbing a photon of light.
  3. 6. a fast-flowing, narrow air current, like a river, high in a planet's atmosphere
  4. 7. Is the largest Canyon system in the solar system
  5. 10. Neptune's largest moon
  6. 14. the Greek personification of terror/dead/ smaller, outermost moon of mars