Astronomers

4. the distance that light can travel in the space of a year
6. Contemporary astronomer who is credited with popularizing astronomy. Author of Contact
7. Belief that the Earth is at the center of the universe and everything orbits around it
8. Astronomer who created 3 laws of motion and defined gravity.
12. The distance from the Sun to the Earth
13. Astronomer who established the 3 laws of planetary motion and determined that the planets travel in ellipses around the Sun rather than circles

1. First woman to discover a comet
2. Greek astronomer who designed the geocentric model of the solar system
3. Physicist who proposed the theory of relativity
5. Belief that the Sun is at the center of the solar system and everything else revolves around it
6. Polish astronomer who proposed the heliocentric model of the solar system in the 1500s
9. Technology that allows us to see objects in space that are very far away
10. Astronomer who determined that the universe itself is expanding. A telescope is named after him.
11. Italian astronomer who first began using telescopes to look at the stars