Jupiter: King of the Planets

1. A substance with no fixed shape or volume.
4. A natural satellite orbiting a planet.
9. A natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, usually near the northern or southern magnetic pole.
10. A very large expanse of sea, in particular, each of the main areas into which the sea is divided geographically.
11. A vehicle used for traveling in space.
13. A planet that orbits a star outside our solar system.
14. A colorless, odorless, inert gaseous element that is the second lightest element and the most abundant element in the universe after hydrogen.
15. A violent disturbance of the atmosphere.
17. The force that attracts a body towards the center of the earth, or towards any other physical body having mass.
18. Exceptionally large.

2. The envelope of gases surrounding a planet.
3. The capacity to have an effect on the character, development, or behavior of someone or something.
5. The largest planet in our solar system.
6. A rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
7. Having the properties of a magnet.
8. A colorless, odorless, highly flammable gas, the simplest and most abundant element in the universe.
10. The curved path of a celestial object around a star, planet, or moon.
11. A mark or area different from its surroundings.
12. A large, bowl-shaped cavity in the ground or on the surface of a planet or the moon, typically one caused by an explosion or the impact of a meteorite or other celestial body.
16. An important assignment carried out for a specific purpose, typically one that involves traveling some distance.