The Moon

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The Moon
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The Moon

• Man in the Moon
• Imaginary image seen on the surface of the moon.
• Drawn in the dark maria (sea) and lighter
  highlands of the moon.
• Myths about image are found in many cultures.

http//en.wikipedia.org/wiki/Man_in_the_moon
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Rotation and Revolution

• Why do we always see the same side of the moon?
• Moons rotation on its axis 27.3 days
• Moons revolution around Earth 27.3 days
• Revolution takes the same amount of time as
  rotation, so we always see the same side of the
  moon facing Earth.

https//www.youtube.com/watch?v6jUpX7J7ySo
https//www.youtube.com/watch?vexIpL0Uhr_k
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Moon Phases and Eclipses
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Moon Phases

• Moon Phases -the different forms the moon takes
  on when viewed from Earth.

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• Phases depend on the relative positions of the
  Earth, Moon, and Sun.

http//astro.unl.edu/naap/lps/animations/lps.swf
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We only can see the day side of the moon when
it reflects the sunlight.
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New Moon

• Occurs when the moon is between the Earth and
  Sun.
• The lighted half of the moon is facing the Sun,
  the dark half is facing Earth.

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New Moon Position
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Waxing

• More of the illuminated half of the Moon can be
  seen each night. (Its getting bigger)
• Waxing First Waxing
• Crescent Quarter Gibbous

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1st Quarter Position
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Full Moon

• Occurs when the moon is opposite the sun, with
  the Earth in between.
• All of the Moons lighted half is facing the
  Earth.

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Full Moon Position
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Waning

• Less of the illuminated half is seen each night.
  (Its getting smaller)
• Waning Third Waning
• Gibbous Quarter Crescent

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3rd Quarter Position
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Shadow

• The Moons shadow appears to move from the right
  to the left.

Left
Right
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Complete Moon Phase Cycle
Crescent 1st qtr Gibbous Gibbous
3rd Qtr Crescent
NEW I------------ WAXING ---------I
FULL I------------WANING----------I NEW
https//www.youtube.com/watch?vNCweccNOaqo
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Name the Phase Quiz
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Full Moon
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1st Quarter
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New Moon
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3rd Quarter
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Waning Gibbous
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Waning Crescent
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Waxing Gibbous
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Waxing Crescent
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Eclipses
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Eclipses

• Caused by the revolution of the moon.
• Occurs when the moon blocks the sunlight from
  reaching the Earth or vice-versa.

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Solar Eclipse

• Occurs when the moon moves directly in between
  the Earth and Sun and casts its shadow on the
  Earth.
• What phase is the moon?
• New Moon

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Shadow of an eclipse

• Umbra-Darkest part of the shadow (total eclipse)
• Penumbra- Lighter, surrounding part of shadow
  (partial eclipse)

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Solar eclipse-notice the CMES around the sun.
Satellite photo of solar eclipse shadow on Earth,
notice the umbra and penumbra areas.
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http//www.youtube.com/watch?vXMyqPxFh5Zw
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Lunar Eclipse

• Occurs when the Earth moves directly between the
  Sun and the Moon. The Earths shadow falls on
  the Moon.
• What phase is the moon?
• Full Moon

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• Sometimes, when the moon is in the umbra,
  sunlight is bent through Earths atmosphere
  causing a red color on the moon.

http//news.bbc.co.uk/1/hi/sci/tech/612949.stm
http//www.youtube.com/watch?vvMw7yamP4Rwfeature
related
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Lunar Eclipse from the Moon
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Will I see an eclipse?

• http//eclipse.gsfc.nasa.gov/eclipse.html

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The moons orbit is tilted so eclipses are rare
events.
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Moon Phases in the Southern Hemisphere

• http//www.tki.org.nz/r/science/day_night/index_e.
  php