Seasons, Tides, And Phases of the Moon
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Transcript of Seasons, Tides, And Phases of the Moon
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Phases of the
Moon
http://www.marcusmoon2022.org/
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8/9/2019 Seasons, Tides, And Phases of the Moon
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What causes the
seasons?
Earth Sun
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8/9/2019 Seasons, Tides, And Phases of the Moon
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How many timesdoes the earth
rotate about itsaxis in a year?
Earth
Sun
365.242 + 1 = 366.242
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8/9/2019 Seasons, Tides, And Phases of the Moon
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North Pole, whichdirection does the
earth rotate?
Earth
Sun
Counter-clockwise
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8/9/2019 Seasons, Tides, And Phases of the Moon
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How do we knowthe earth is
rotating?s Foucault Pendulum (1851)
s Coriolis Effect
xWind Patterns
xProjectile Deflection
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8/9/2019 Seasons, Tides, And Phases of the Moon
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How do we knowthe earth orbits
the sun?s Annual Parallax of the Stars
(1837) - nearby stars appear to
move
s Aberration of Starlight (1727) -
change in apparent direction of
stars, cf: raindrops
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8/9/2019 Seasons, Tides, And Phases of the Moon
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What causes thephases of the
moon?
Moon
Earth
Sun
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8/9/2019 Seasons, Tides, And Phases of the Moon
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observe acrescent moon
in the evening,do the tips pointleft or right?
West
Facing South su
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Can a full moon
rise at midnight?
Earth
Sun
Full
Moon
New
MoonHalf
Moon
No!
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Half
Moon
Sun
How can you tellthe moon is close
and the sun is far?
Earth
Sunoon
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8/9/2019 Seasons, Tides, And Phases of the Moon
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the earth as a10 globe, how
far is the moon,sun, etc.?Moon: 25 feet
Sun: 1.9 miles
Pluto: 73 miles
Alpha Centauri: 500,000 miles
Space Shuttle: 0.25 inch
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8/9/2019 Seasons, Tides, And Phases of the Moon
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What causes an
eclipse?
Earth
Sun
Lunar
Eclipse
Solar
Eclipse
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Why do we alwayssee the same face
of the moon?
MoonEarth
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8/9/2019 Seasons, Tides, And Phases of the Moon
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What causes the
tides?
Earth
Sun
Moon
Moon
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Where is thecenter-of-mass of
the earth+moon?
Earth
Moon
R = 0.75Re
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8/9/2019 Seasons, Tides, And Phases of the Moon
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Where is thecenter-of-mass of
the sun+earth?
Sun
Earth
R = 0.0006Rs
Wh t d th
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What does theorbit of the moon
around the sunlook like?
Sun
Moon
