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The Moon

The Moon. Crater Formation. Phases of the Moon. Identify the Phases . Crescent Moon - when we can see only a sliver of the moon's disk (the side of the moon facing us) Full Moon - when the moon's disk is light because the Earth is between the sun and the moon

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The Moon

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  1. The Moon

  2. Crater Formation

  3. Phases of the Moon

  4. Identify the Phases • Crescent Moon - when we can see only a sliver of the moon's disk (the side of the moon facing us) • Full Moon - when the moon's disk is light because the Earth is between the sun and the moon • Gibbous Moon - when we can see roughly three-quarters of the moon's disk • Quarter - when we can see one half of the moon's disk (this is one-quarter of the entire moon's surface) • New Moon - when the moon's disk is dark (and invisible to us) because the moon is between the sun and the Earth • Waning Moon - when the moon seems to be getting smaller, going from full to gibbous to half to crescent to new • Waxing Moon - when the moon seems to be getting bigger, going from new to crescent to half to gibbous to full

  5. Animation of motion

  6. Moon phases Data • The Moon appears to go through phases. The period of this cycle is approximately 29.5 Earth days.) • The moon takes about 27.3 days (about a month) to revolve around Earth, traveling at an average distance of about 384,000 kilometers. • Its diameter of the moon is about a quarter that of Earth's. • The Moon rises in the east and sets in the west daily, but its position in the sky moves EASTWARD by about 13 degrees per day. • (360 degrees divided by 27.32 days = 13.177 degrees per day)

  7. Orbit Angle changes Sidereal Month : The daily motion of this point provides a measure of the rotation of the Earth with respect to the stars, rather than the Sun.

  8. Moon Phase Views New Moon - The Moon's unilluminated side is facing the Earth. Waxing Crescent - The Moon appears to be partly but less than one-half illuminated by direct sunlight First Quarter - One-half of the Moon appears to be illuminated by direct sunlight Waxing Gibbous - The Moon appears to be more than one-half but not fully illuminated by direct sunlight

  9. Moon Phase Views continued Full Moon - The Moon's illuminated side is facing the Earth Waning Gibbous - The Moon appears to be more than one-half but not fully illuminated by direct sunlight. Last Quarter - One-half of the Moon appears to be illuminated by direct sunlight Waning Crescent - The Moon appears to be partly but less than one-half illuminated by direct sunlight

  10. Eclipse of the Moon

  11. Images Of a Lunar Eclipse

  12. Summary • The phases of The moon is caused by the orbit of the Moon around the Earth • The Sun illuminates the Moon at different angles during the month • The names of the Moon’s phases are based on the amount of illumination and the process of increasing size (waxing) or decreasing size (waning) • The orbit is divided into 4 quarters.

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