Moon Section 19-2. Motions of the Moon  Moon rotation = 27.3 days  Moon revolution = 27.3 days  Therefore, the same side of the Moon always faces.

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Presentation transcript:

Moon Section 19-2

Motions of the Moon  Moon rotation = 27.3 days  Moon revolution = 27.3 days  Therefore, the same side of the Moon always faces Earth.

Phases of the Moon  The different shapes of the Moon as seen from Earth  Depends on how much of the sun-side of the Moon faces Earth

Shapes of the Moon  Crescent – small sliver  Quarter – literally ¼ of the moon  Gibbous – not quite round (humpbacked)  Full – completely visible  New – not visible, all dark

Moon-phase Vocab  WAXING  In this ½ of the cycle, the visible part of the moon is getting bigger.  It is building up, like a “waxy build-up”  WANING  In this ½ of the cycle, the visible part of the moon is getting smaller  It is “waning” away

We see: ?

Phases of the Moon

The Lunar Cycle One full cycle of the moon = 29.5 days.

Eclipses  When the moon’s shadow hits Earth or...  When Earth’s shadow hits the Moon

Solar Eclipse  Moon is between Earth and Sun  Moon’s shadow on Earth blocks out Sun

Solar Eclipse  TOTAL Solar Eclipse occurs in the UMBRA  The Umbra is the darkest part of the moon’s shadow.

Solar Eclipse  PARTIAL Solar Eclipse occurs in the PENUMBRA  The Penumbra is the larger and less dark part of the moon’s shadow.

Total Solar Eclipse

Partial Solar Eclipse

Lunar Eclipse  Earth blocks sunlight from reaching the Moon  Occurs only at full moon  Moon will look red

Lunar Eclipse

Next Eclipses 2008  2008 Feb 07: Annular Solar Eclipse 2008 Feb 07: Annular Solar Eclipse  2008 Feb 21: Total Lunar Eclipse 2008 Feb 21: Total Lunar Eclipse  2008 Aug 01: Total Solar Eclipse 2008 Aug 01: Total Solar Eclipse  2008 Aug 16: Partial Lunar Eclipse 2008 Aug 16: Partial Lunar Eclipse 2009  2009 Jan 26: Annular Solar Eclipse 2009 Jan 26: Annular Solar Eclipse  2009 Feb 09: Penumbral Lunar Eclipse 2009 Feb 09: Penumbral Lunar Eclipse  2009 Jul 07: Penumbral Lunar Eclipse 2009 Jul 07: Penumbral Lunar Eclipse  2009 Jul 22: Total Solar Eclipse 2009 Jul 22: Total Solar Eclipse  2009 Aug 06: Penumbral Lunar Eclipse 2009 Aug 06: Penumbral Lunar Eclipse  2009 Dec 31: Partial Lunar Eclipse 2009 Dec 31: Partial Lunar Eclipse

Tides  Caused by the gravitational pull of Moon on Earth  2 tide cycles per day