Across
- 6. A massive multi-ringed impact Crater on the planet murcury
- 9. A massive shield volcano on the planet Venus and tallest planetary mountain in the solar system
- 11. The smaller ,smoother, and outermost of the two natural satellites orbiting Mars
- 12. The massive outer planets in our solar system that share characteristics similar to Jupiter
- 14. A massive system of interconnected canyons stretching across the equatorial region of Mars
- 16. A fast-flowing, narrow, and stable band of atmospheric gas or wind that encircles a planet or moon
- 17. The process by which a chemical colecule absorbs a high-energy photon and breaks apart into smaller neutral atoms
Down
- 1. A vast, continent sized highland region (or terra) located in the northern hemisphere of the planet Venus
- 2. The larger, innermost, and closest natural satellite (moon) of the planet Mars
- 3. an active observation technique where powerful radio or microwaves are transmitted toward a celestial object
- 4. The four largest natural satellites of Jupiter
- 5. A flat, disk- or torus- shaped collection of countless small, independent particles- such as ice, rock, dust, and larger moonlets
- 7. A planetary body composed primarily of silicate rocks, metals, or a solid surface rather than mostly gas or ice
- 8. The minimum distance a celestial body (held together only buy its own gravity) can approach a second, larger body before the primary body's tidal gravitational forces exceed the secondary body's internal self-gravity
- 10. The largest and most massive natural satellite (moon) in the solar system
- 13. the largest moon of Saturn and the second largest natural satellite in the solar system
- 15. The largest natural satellite of Neptune and the only large moon in the solar system with a retrograde orbit
- 18. A steep cliff or long, continuous slope on the surface of a planet or moons formed by techtonic activity rather than erosion