photo taken near the landing site of apollo 17. crescent moon
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![Page 1: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/1.jpg)
Photo taken near the landing site of Apollo 17
![Page 2: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/2.jpg)
Crescent Moon
![Page 3: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/3.jpg)
Quarter Moon
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GibbousMoon
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Full Moon
![Page 6: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/6.jpg)
The moon’s diameter is about ¼ or 25% of the earth’s.
So, if the earth is about 13,000 km in diameter, the moon is about 3,250 km
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The moon is about 384,000 km from the earth.
So, you could say that the moon is about 30 “earths” away from earth.
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The BARYCENTER of the earth-moon system is much closer to the earth
than the moon.
The BARYCENTER is theCENTER OF GRAVITY between the
Earth and the Moon.
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Galileo Galilee
1609
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Galileo Galilee
1609
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maria
terrae
(dark because
of volcanic activity)
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Craters on the Moon are caused by falling comets and asteroids.
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The diameter of the crater is usually 5 to 10 times the diameter of the
impacting body.
![Page 14: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/14.jpg)
![Page 15: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/15.jpg)
The RAYS that surround some craters are probably caused by the lighter
color of the material ejected during an impact.
![Page 16: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/16.jpg)
![Page 17: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/17.jpg)
RILLES are formations that can either be straight or winding.
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The rilles were probably caused by volcanic activity.
![Page 19: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/19.jpg)
Is there any volcanic activity (volcanism) on the moon today?
Probably not.
![Page 20: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/20.jpg)
lunar basalt
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anorthosite
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breccia
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tektites
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![Page 25: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/25.jpg)
How does the moon cause tides?
HIGH TIDE LOW TIDE
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The Moon has much less
atmosphere than Earth
because, due to the moon’s weak gravity, gases escape as quickly as
they’re caught.
![Page 27: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/27.jpg)
Four partsOf the Moon’sInterior:
1)Core2)Partially
MoltenRegion
3) Lithosphere4) Crust
![Page 28: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/28.jpg)
The FISSION theory of moon origin:
The moon was once part of the earth, but it broke away because the earth
once rotated very rapidly.
![Page 29: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/29.jpg)
The ACCRETION theory of moon origin:
The moon formed in orbit around the earth, but not out of material drawn
from the earth.
The CAPTURE theory of moon origin:
The moon formed elsewhere in the solar system and was captured by the
earth during a close encounter.
![Page 30: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/30.jpg)
The GIANT IMPACT theory ofmoon origin
The theory that is now the most widely accepted
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The GIANT IMPACT theory ofmoon origin:
![Page 32: Photo taken near the landing site of Apollo 17. Crescent Moon](https://reader036.vdocuments.site/reader036/viewer/2022062314/56649f1b5503460f94c31904/html5/thumbnails/32.jpg)
The GIANT IMPACT theory ofmoon origin:The GIANT IMPACT Theory states that,
when the young earth was forming, an extremely massive object struck the Earth, shooting debris into space. Some of this debris collected to form the Moon.