| The Moon is about ____ miles from the Earth. |
2 |
| About ____ planets have been discovered in the Milky Way. |
6 |
| Mercury and Venus have no moons. Mars has ____ moons. |
14 |
| Earth rotates about ____ times per orbit around the Sun. |
15 |
| The Big Bang occurred a little less than ____ billion years ago. |
30 |
| Earth rotates to the east at ____ (360/24) degrees per hour. |
365 |
| Neptune is about ____ astronomical units (AU) from the Sun. |
5,100 |
| Your weight (not mass) would be ____ times less on the Moon. |
239,000 |
