Astronomy

2. Discovered spots on Sun and craters on the Moon.
5. Discovered in 1801 by William Herschel and Giuseppe Piazzi.
7. This planet was discovered in 1846.
9. States that the Earth is at the center of the universe.
11. Allows for us to see further into space than simply using the human eye. It was invented by Hans Lippershey.
13. First space shuttle.
14. _____'s Laws of Motion.
16. The first artificial space satellite.
17. First man to step foot on the moon.

1. States that the Sun is at the center of the universe.
3. Observed a supernova in the sky.
4. Known for the geocentric theory.
6. Discovered by William Herschel in 1800, it focuses on energy given out by different colors.
8. An international space station that was established in 1958.
10. First spacecraft to reach interstellar space.
12. Known for the heliocentric theory.
15. The United States first space station.