| Your weight (not mass) would be ____ times less on the Moon. |
2 |
| Earth rotates about ____ times per orbit around the Sun. |
3 |
| About ____ planets have been discovered in the Milky Way. |
4 |
| Neptune is about ____ astronomical units (AU) from the Sun. |
6 |
| The Moon is ____ times larger than the dwarf planet Pluto. |
14 |
| Earth is almost ____ times larger than the Moon. |
30 |
| Mercury and Venus have no moons. Mars has ____ moons. |
365 |
| The Big Bang occurred a little less than ____ billion years ago. |
5,100 |
