| A | B |
|---|
| discovered | to have seen or found out for the first time |
| visible | able to be seen |
| lunar | having to do with the moon |
| spacecraft | a vehicle used for flight in outer space |
| surface | the outside of a thing |
| footprint | a mark made by a foot or shoe |
| half | either of 2 equal parts |
| gem | a precious or semiprecious stone |
| gym | facilities designed to improve fitness and health |
| against | in opposition to |
