Moon Phases

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Moon Phases

• Melissa Drake

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Why does the moon have different phases?
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Because

• The moon doesnt produce light of its own
• Moonlight we see is the sunlight reflected on the
  moon surface

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Moon Phase Types

• New Moon
• Waxing Crescent Moon
• First Quarter Moon
• Full Moon
• Waning Gibbous Moon
• Last Quarter Moon
• Waning Crescent Moon

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New Moon

• Occurs when the moon is roughly the same
  direction as the sun. The dark part of the moon
  that is facing earth is called the New Moon.

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Waxing Crescent Moon

• When more of the illuminated part of the moon
  shows, its called waxing. It starts as a tiny
  sliver then grows each day.

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First Quarter Moon

• The week after a new moon, it has completed the
  first ¼ of its way around the sun.

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Waxing Gibbous Moon

• Waxing means growing, and as the week continues
  the moon begins to illuminate more each day.

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Full Moon

• At two weeks, the moon has completed half its
  cycle. The moon then is half way facing the sun
  and half way towards earth.

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Waning Gibbous Moon

• From the full moon after the moon begins to
  decrease, before it was increasing. This is why
  its called Waning.

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Last Quarter Moon

• Three weeks have gone by now. The moon now shows
  the last ¼ of the moon.

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Waning Crescent

• Is last of the moons phases and it is slowly
  decreasing each day to a tiny sliver before the
  process starts over to a new moon.

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Moon Statistical Facts

• Mass 73'490'000'000'000'000 million kg
• Shape Egg-shaped
• Distance from earth384'467 km 
• (364 397 km at perigee,                        
       406 731 km at apogee)
• Diameter  3476 km (1/4 of the Earth's)
• Revolution period 27.3217 days
• http//www.moonphases.info/Moon_Information

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Interesting Moon Facts

• Rotation of moonThe same side of the Moon
  always faces the Earth. The Moon's rotation
  period is synchronous with its revolution period
  around the Earth
• Sun and Moon EclipsesAn eclipse of the Sun can
  occur only at New Moon, while an eclipse of the
  Moon can occur only at Full Moon.
• (http//www.moonphases.info/Moon_Information)

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Interesting Facts about the Moon

• Calculation of the Easter dateEaster is the
  first Sunday after the first Saturday after the
  first full moon after the equinox. (The equinox
  is quite often March 21, but can also occur on
  the March 20 or 22.)

http//www.moonphases.info/Moon_Information
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Cool Websites about the moon

• http//www.scienceu.com/observatory/articles/phase
  s/phases.html
• http//stardate.org/nightsky/moon/index.php?month
  5year2007cssmoon.cssSubmitGo
• http//www.moonphases.info/moon_phases.htmlMonths
  _without_a_full_moon