| A | B |
|---|
| celestial objects | objects observed in the sky during the day or night |
| arc | the apparent east/west motion of celestial objects around the earth |
| Polaris | the North Star |
| constellation | a group of stars that make an identifiable pattern in the sky |
| apparent daily motion | the planets and stars seem to rotate counterclockwise around Polaris, due to the rotation of the earth |
| earth revolution | a slightly elliptical orbit around the Sun |
| earth rotation | a spinning of the earth around its north/south axis |
| Foucalt pendulum | freely swinging pendulum which appears to change direction in a predictable manner |
| Coriolis effect | all moving materials on the Earth's surface undergo horizontal deflection caused by the Earth's rotation |
| seasons | direct result of the relative position of the Sun in the sky at different times of the year |
