Space

2. A collection of stars and their solar systems, gas and dust, all held together by gravity.
5. A luminous object consisting mostly of hydrogen and helium, held together by its own gravity.
9. A piece of rock or metal that falls from space into the Earth's atmosphere, where it burns and glows with heat.
11. The collection of eight planets, their moons, dwarf planets and other natural satellites that orbit around the Sun.
13. A curved path that an object takes around another object.
14. Everything that exists.
15. A force of attraction that pulls all things with mass toward one another.

1. The time taken for the Earth to rotate once on its axis.
3. A scientist who studies space.
4. An object which orbits a planet.
6. The galaxy where our solar system is found.
7. The distance light travels in one year (in a vacuum).
8. The time for the Earth to make one complete orbit around the Sun.
10. an object that orbits a star, has sufficient mass to be round or nearly round, and has removed the debris and small objects from the area around its orbit.
12. An object that orbits a planet or asteroid.