1. The moon of the EARTH What are the phases of the moon? What affect does it have on the earth?

2. Important terms in Astronomy… Rotation- To spin around an axis Rotate Like a ballerina or a merry-go-round

3. Important Terms in Astronomy… Revolution-To go around an object in a curved path Revolve

5. Important Terms in Astronomy… Orbit- The path a body (such as a planet) takes in its revolution around another body (like the Sun).

6. How far away is the MOON? 380,000 km ( about 239,000 miles) Moving away slightly each year (3.8 cm) less than 2 inches

7. What is a SATELLITE? A natural or man made object that revolves around a planet A natural satellite is a MOON Earth’s moon is also called LUNA

8. What is the moon doing out in space? Revolving around the Earth in a counterclockwise direction Rotating on its axis as it goes around the Earth

9. 27 days to go through a complete cycle We always see the same side of the moon because… 27 days to complete 1 rotation on its axis 27 days to complete 1 revolution around the earth

10. Comprehension Check: 1. What does it mean when the earth REVOLVES around the sun? 2. What does it mean when the moon is ROTATING?

11. Where did the Moon come from?

12. Giant Impact Theory Earth struck by large body, size of Mars. Part of body + Earth flung into space. Captured by gravity of Earth.