Solar vs Lunar Month

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Solar vs Lunar Month

• Created for PHCA
• By
• Dick Heckathorn
• 6 March 2K 6

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Earth-Moon Discussion

• 1. The moon revolves about the earth in the same
  direction as the earth rotates.
• 2. This motion is completed, relative to the
  stars, in 27.3 days.
• 3. Because the earth is moving about the sun, the
  time from new moon to new moon is a bit longer
  29.5 days.

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Moon one rotation around earth
Moon 1/4 way around earth
Moon 3/4 way around earth
Moon between earth and sun
Moon between earth and sun
Moon 1/2 way around earth
27.3 days
Sidereal Month
m3
m2
e
m4
29.4 days
m1
27.3 days
Synodic Month
m5
29.4 days
m6
Sun
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Thats All Folks