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Title:

The Earth-Moon-Sun System

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The Earth-Moon-Sun System Rotation vs. Revolution Rotation the spinning of a body on its axis Revolution the motion of a body along a path around some point ... – PowerPoint PPT presentation

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Title: The Earth-Moon-Sun System


1
The Earth-Moon-Sun System
2
Rotation vs. Revolution
  • Rotation the spinning of a body on its axis
  • Revolution the motion of a body along a path
    around some point in space

3
Precession
  • The slight movement of Earths axis over a period
    of 26,000 years

4
Seasons
  • Caused because Earths axis is tilted 23.5
    degrees
  • Summer N. Hemisphere is farthest from sun
  • Winter N. Hemisphere is closest to sun

5
Moon Shine
  • The moon does not make its own light. It
    reflects sunlight.

6
Waxing Waning
  • Waxing Light side gets larger
  • Waning Light side gets smaller

New Moon First Quarter Full Moon Third Quarter
New Moon
Animation
7
Phases of the Moon
8
Eclipses
  • Lunar The shadow from Earth blocks the light
    from the sun. Lunar Moon goes dark.
  • Solar The shadow from the Moon blocks the light
    from the sun. Solar Sun goes dark.

9
Umbra Penumbra
  • The Moon Earth cast 2 shadows. The darkest is
    the Umbra. The lighter is the Penumbra.

10
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11
The Origin of the Moon
  • It is widely believed that the moon was formed
    when a Mars sized object smashed into the early
    Earth.

12
The Lunar Surface
  • Craters round depressions in the surface of the
    moon most were produced by the impact of
    rapidly moving debris

13
  • Highlands densely pitted, light-colored areas
    that cover most of the lunar surface

14
  • Maria dark, smooth surfaces originated when
    asteroids punctured the lunar surface, letting
    magma bleed out

15
  • Lunar Regolith a soil-like layer of gray debris
    covering the surface of the moon made up of
    rocks, glass beads, and fine lunar dust

16
Tides
  • Tides are the regular rise and fall of the ocean,
    caused by the moons gravitational pull on Earth.
  • Spring Tide- sun, earth, moon in straight line
    and change between high and low tides are
    greatest
  • Neap Tide- sun and moon are pulling at earth at
    right angles resulting in little change in low
    and high tides

17
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