Gauge Cumpata vocabulary crossword

3. Neptune's largest moon, which orbits the planet in a "backward" or retrograde direction.
5. Saturn's largest moon, famous for its thick orange atmosphere and lakes of liquid methane.
6. The smallest and outermost moon of Mars, named after the Greek personification of terror.
8. The collective name for Io, Europa, Ganymede, and Callisto, first observed in 1610.
11. The "Grand Canyon of Mars," a massive tectonic crack that would stretch across the entire United States.
14. High-speed, narrow bands of wind that create the banded appearances of Jupiter and Saturn.
15. The "gas giants" located beyond the asteroid belt, characterized by large sizes and lack of solid surfaces.
16. The group of inner, rocky worlds consisting of Mercury, Venus, Earth, and Mars.
18. The largest moon in the solar system, even surpassing the planet Mercury in size.

1. The process by which sunlight breaks down chemical compounds, such as water vapor in an atmosphere.
2. The critical distance from a planet within which a moon will be torn apart by tidal forces.
4. Discs of cosmic dust and ice orbiting all four Jovian planets, most notably Saturn.
7. A shield volcano on Mars that stands nearly three times the height of Mount Everest.
9. A massive impact crater on Mercury that is one of the largest such features in the solar system.
10. The larger and closer of the two Martian moons, destined to eventually crash into the planet.
12. A cliff-like ridge on Mercury or the Moon, often formed as the planetary body cooled and "shrank."
13. An imaging technique used to "see" through the thick clouds of Venus to map its hidden surface.
17. One of the two major highland "continents" on Venus, named after a Babylonian goddess.