| A | B |
| astronomer (n) | a person who studies the sun, planets, stars, and other objects in space |
| besides (adv) | in addition to or also |
| crater (n) | a round hole in the shape of a bowl, it is found in the ground or at the mouth of a volcano |
| degree (n) | a unit for measuring how warm something is |
| degree (n) | a stage or step in a series that one goes through |
| diameter (n) | the distance from side to side and through the center of a circle or a round object |
| gaze (v) | to look steadily at something for a long time |
| gravity (n) | the force on our planet that pulls things toward the center of the earth |
| gravity (n) | the condition of being serious |
| reflect (v) | to turn or throw something back |
| reflect (v) | to think carefully about something |
| telescope (n) | an object that makes distant things seem closer and larger, it does this by using mirrors and lenses |
| universe (n) | all of space and all of the objects in space |