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How long is one rotation of Earth? How long is one revolution of Earth?

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Presentation on theme: "How long is one rotation of Earth? How long is one revolution of Earth?"— Presentation transcript:

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2 How long is one rotation of Earth? How long is one revolution of Earth?

3 Rising and Setting of the Sun Rising and Setting of the Moon The Seasons Changing Constellations Movement of Stars through the sky

4 One rotation = 360° Time for one rotation = 24 hours 360° ÷ 24 = 15°/hr

5 How many degrees did the stars move from diagram 1 to diagram 2? 30° (2 hours x 15°)

6 How can you find Polaris? It’s the only one that didn’t move

7 What hemisphere must you be in? Why? Northern Because Polaris can only been seen in the North

8 What direction must you be looking? North

9 What direction do the stars appear to move?

10 What causes the stars appear to move?

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