Space Crossword

3. Jupiter, Saturn, Uranus and Neptune
6. Mercury, Venus, Earth and Mars
8. an object that orbits the sun but is too small to be considered a planet
9. the spiral galaxy to which our solar system belongs
10. a meteor that travels through Earth’s atmosphere and strikes the ground
11. an object in space made of mostly ice and dust
13. reactions which combine light elements such as hydrogen into heavier elements such as helium, releasing energy
14. an enormous hot ball of gas held together tightly by gravity which produces energy through nuclear fusion reactions in its core

1. the distance light travels in one year – 9.46 x 1012 km
2. the repeating circular (or elliptical) path an object takes around a gravity source, such as a planet or a star.
4. a distance equal to 150 million kilometers, or the distance from the Earth to the Sun
5. a group of stars, dust gas, and other objects held together by gravitational forces
6. a cycle of rising and falling sea levels that repeats every 12 hours
7. the sun, planets, and their moon,s and other objects that are gravitationally bound to the sun
12. a chunk of burning rock traveling through earth’s atmosphere