1
		2		3
4														5
				6													7
		8											9
											10
11
													12
								13
14
15
								16

Across 3. Invented telescope in 1609 6. Variance in the path of any object from its predicted orbit 8. Law of proportions, discovered by Kepler 9. Second closest moon to Jupiter 11. An apparent displacement or difference in the apparent position of an object viewed along two different lines of sight 13. Polish Astronomer 14. The amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit. 15. Calculated the circumference of the earth 16. Third moon from Jupiter

Down 1. The apparent backwards motion of a planet 2. A closed, oval-shaped curve with two foci. 4. Farthest moon from Jupiter 5. Closest moon to Jupiter 7. Compiled a star catalog of 850 stars 10. 93 Million Miles 12. A ring of massive stones built around 2100 b.c.