Space

2. the spiral galaxy to which our solar system belongs
5. An enormous hot ball of gas by gravity which produces energy through nuclear fusion reactions in its core.
7. an object in space mostly made of ice and dust
10. Saturn, Uranus, Neptune, and Jupiter\
13. The sun, planets, and their moons, and other objects that are gravitational to the sun.
14. A meteor that passes through earth's atmosphere and strikes the ground.
15. when the moon is not visible

1. cycle of rising and falling sea levels that repeats every 12 hours.
3. The distance equal to 150 kilometers, or the distance from earth to the sun.
4. A Reaction that combine light elements such as hydrogen into heavier elements such as helium, releasing energy.
6. A group of stars, dust, gas, and other objects held together by gravitational forces.
8. A chunk of burning rock traveling through Earth's atmosphere
9. when the moon is fully visible
11. An object that orbits the sun, but is too small to be considered a planet.
12. the distance light travels through space in one year– 9.46x10 to the 12th power km.