1 / 20

8.5 Lunar Phases

8.5 Lunar Phases. Unit 8: Astronomy. Vocabulary. apogee : point at which the moon is farthest from the earth. Vocabulary. apogee : point at which the moon is farthest from the earth crescent: phase when less than half the moon is visible. Vocabulary.

tyme
Download Presentation

8.5 Lunar Phases

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 8.5 Lunar Phases Unit 8: Astronomy Sanders

  2. Vocabulary • apogee: point at which the moon is farthest from the earth Unit 8: Astronomy

  3. Vocabulary • apogee: point at which the moon is farthest from the earth • crescent: phase when less than half the moon is visible Unit 8: Astronomy

  4. Vocabulary • apogee: point at which the moon is farthest from the earth • crescent: phase when less than half the moon is visible • gibbous: phase when more than half the moon is visible Unit 8: Astronomy

  5. Vocabulary • apogee: point at which the moon is farthest from the earth • crescent: phase when less than half the moon is visible • gibbous: phase when more than half the moon is visible • perigee: point at which the moon is closest to the earth Unit 8: Astronomy

  6. Vocabulary • apogee: point at which the moon is farthest from the earth • crescent: phase when less than half the moon is visible • gibbous: phase when more than half the moon is visible • perigee: point at which the moon is closest to the earth • phases: changing shapes of the moon Unit 8: Astronomy

  7. Months • It takes the moon 27.5 days to rotate once on its axis. Unit 8: Astronomy

  8. Months • It takes the moon 27.5 days to rotate once on its axis. • This is called a sidereal month. Unit 8: Astronomy

  9. Months • It takes the moon 27.5 days to rotate once on its axis. • This is called a sidereal month. • It is the time cycle that it takes moon to make one full orbit Unit 8: Astronomy

  10. Months • A complete cycle of the moon's phases takes 29.5 days. Unit 8: Astronomy

  11. Months • A complete cycle of the moon's phases takes 29.5 days. • This is called a synodic month. Unit 8: Astronomy

  12. Sidereal - Synodic? • This 2.5 day difference occurs because as the moon orbits Earth, Earth orbits the sun. Unit 8: Astronomy

  13. Sidereal - Synodic? • This 2.5 day difference occurs because as the moon orbits Earth, Earth orbits the sun. • When the moon gets back to its original position, it must move the extra distance to make up for the Earth’s travels in its orbit. Unit 8: Astronomy

  14. Unit 8: Astronomy

  15. Why do we see the same side of the moon? • To sum up; the periods of rotation and revolution for the moon are equal. Unit 8: Astronomy

  16. Why do we see the same side of the moon? • To sum up; the periods of rotation and revolution for the moon are equal. • Turn to page 15 of the ESRT. Unit 8: Astronomy

  17. Why do we see the same side of the moon? • To sum up; the periods of rotation and revolution for the moon are equal. • Turn to page 15 of the ESRT. Unit 8: Astronomy

  18. Unit 8: Astronomy

  19. Phases • Note that the waxing moon has light on the right side of the moon. • The waning side has light on the left. Unit 8: Astronomy

  20. Unit 8: Astronomy

More Related