| The Moon is about ____ miles from the Earth. |
2 |
| Mercury and Venus have no moons. Mars has ____ moons. |
3 |
| There are ____ planets in the Solar System. |
4 |
| Earth is almost ____ times larger than the Moon. |
8 |
| The Sun is about ____ times larger than the Earth. |
100 |
| Earth rotates about ____ times per orbit around the Sun. |
365 |
| The Moon is ____ times larger than the dwarf planet Pluto. |
5,100 |
| About ____ planets have been discovered in the Milky Way. |
239,000 |
