front 1 Rotation | back 1 A spinning motion. |
front 2 Rotation Axis | back 2 The line on which an object rotates. |
front 3 Orbit | back 3 The path an object follows as it moves around another object. |
front 4 Revolution | back 4 The motion of one object around another. |
front 5 Solstice | back 5 A day when Earth's rotation axis is most toward or away from the Sun. |
front 6 Equinox | back 6 A day when Earth's rotation axis is leaning along Earth's orbit. Neither toward nor away from the Sun. |