| A | B |
|---|
| axis | an imaginary straight line around which an object spins. |
| orbit | the path followed by an object in space as it goes around another object; to travel around another object in a single path. |
| reflect | to throw back light, heat, or sound. |
| revolve | to move in an orbit or circle around something. |
| rotate | to turn around a center point, or axis, like a wheel turns on a bicycle. |
| satellite | an object that moves around a larger object. |
| solar eclipse | will occur when the moon moves between the sun and the Earth. |
| lunar eclipse | will occur when it moves into the Earth's shadow. |
| waxing crescent | is part way between a new moon and a half moon. |
| first quarter | the right half of the side of the moon facing earth is it. |
| waxing gibbous | is between a half moon and a full moon. |
| full moon | is when the earth is between the moon and the sun. |
| waning gibbous | is between a full moon and a half moon. |
| last quarter | is when the left half of the moon facing the earth is lit. |
| waning crecent | is part way between a half moon and a new moon. |
| new moon | is the phase of the moon when the moon is not visible from Earth because the side of the moon that is facing us in not being lit by the sun. |
| blue moon | is the third full moon that occurs in a season of the year which has four full moons (usually each season has only three full moons). |
