4.
The closest planet to the sun.
5.
The first planet spotted with a telescope.
6.
The closest planet to earth.
8.
The planet NASA is trying to take us to.
9.
The planet known for having rings.
10.
The thing that orbits earth.
11.
The dwarf planet with 9 hour days.
12.
The dwarf planet they used to call the easter bunny.
13.
The dwarf planet that has 4 hour days and is lop-sided.
14.
"Pluto might be bigger but I've got more mass."
15.
The dwarf planet used to be a real planet.
