the moon · dark side? synchronous rotation is the reason we never see the dark side of the moon....
TRANSCRIPT
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The Moon
It's Just a Phase It's Going Through...
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Moon
Our planet's large natural
satellite, the Moon, is the easiest astronomical object to observe.
The only "scientific instrument" you'll need at first is a pair of eyes.
Picture from NASA
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The Moon's Orbit
Rotation – Moon is spinning on its
axis
Revolution – The moon orbits around
the Earth
– It takes the moon approximately one month to go around the Earth.
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Daytime and Nighttime Moon
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Why do we never see the DARK SIDE?
Synchronous Rotation is the reason we never see the dark side of the moon.
Over the millennia, the Moon has become "locked" into a special kind of motion around the Earth.
It rotates on its axis at the same pace as it revolves around the Earth
As a result, the Moon keeps the same face toward us throughout its orbit.
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Phases
The lighted side of the moon always faces
the sun.
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New Moon
New moon occurs when the moon is between the sun & the Earth.
The dark side of the moon is facing the Earth.
What we see
What is happening from above.
E
Sunlight
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Waxing
When the moon
is between new
& full, the visible
part of the moon
is increasing.
This is called
waxing
E
Sunlight
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Waxing Crescent
Moon
When the moon
is between New
& 1st Quarter it is
called a waxing
crescent.
Sunlight
What we see
What is happening from above.
E
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First Quarter Moon
The First quarter moon occurs when the moon is halfway between new and full.
As seen from the Earth, half the moon’s disk is illuminated.
What we see
What is happening from above.
E
Sunlight
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Waxing Gibbous
Moon
When the moon
is between 1st
Quarter & Full it
is called a
waxing gibbous.
What we see
What is happening from above.
E
Sunlight
![Page 15: The Moon · DARK SIDE? Synchronous Rotation is the reason we never see the dark side of the moon. Over the millennia, the Moon has become "locked" into a special kind of motion around](https://reader030.vdocuments.us/reader030/viewer/2022040604/5ea6d27c872de6587d595698/html5/thumbnails/15.jpg)
Full Moon
The full moon occurs when the Moon & the Sun are on opposite sides of the Earth.
The lighted side of the moon is facing Earth.
What we see
What is happening from above.
E
Sunlight
![Page 16: The Moon · DARK SIDE? Synchronous Rotation is the reason we never see the dark side of the moon. Over the millennia, the Moon has become "locked" into a special kind of motion around](https://reader030.vdocuments.us/reader030/viewer/2022040604/5ea6d27c872de6587d595698/html5/thumbnails/16.jpg)
Waning
When the moon
is between full &
new, the visible
part of the moon
is decreasing.
This is called
waning.
E
Sunlight
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Waning Gibbous
Moon
When the moon
is between Full &
Last it is called a
waning gibbous.
What we see
What is happening from above.
E
Sunlight
![Page 18: The Moon · DARK SIDE? Synchronous Rotation is the reason we never see the dark side of the moon. Over the millennia, the Moon has become "locked" into a special kind of motion around](https://reader030.vdocuments.us/reader030/viewer/2022040604/5ea6d27c872de6587d595698/html5/thumbnails/18.jpg)
Last Quarter Moon
The third or last quarter moon occurs halfway between the full moon & the new moon.
As seen from the Earth, half the moon’s disk is illuminated.
What is happening from above.
E
Sunlight
What we see
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Waning Crescent
Moon
When the moon
is between Last
Quarter and New
it is called a
waning crescent.
Sunlight
What we see
What is happening from above.
E