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Universe 1
Astronomy 20 1
The MoonOur Nearest Neighbor
Astronomy 20 2
The Moon
Moon Influences The month
Month = moonth Easter & Passover Tides Full Moon madness Menstrual Cycle
Astronomy 20 3
The Moon
The Moon Illusion
Universe 2
Astronomy 20 4
The Moon
Astronomy 20 5
The Moon
Harvest Moon Nearest full moon to the Sept. equinox The Moon rises just after sunset for
several days in a row.
Astronomy 20 6
The Moon
Blue Moon
Trivial Pursuit: The second fullmoon in a calendar month isa Blue Moon.
Reality: “Once in a blue moon”means never.
Universe 3
Astronomy 20 7
The Moon
Why the Moon Shouldn’t Be There
Other terrestrial planetslack large moons.
Other moons are tinycompared with their planets.
Astronomy 20 8
The Moon
What if there were no Moon?
Fast rotation Constant winds No tides
no life on land? Varying tilt
bizarre seasons
Astronomy 20 9
The Moon
Formation of the MoonThe Giant Impact Theory
Density: 3.3 -> very small core. Moon formed from mantle material. Lack of "volatiles" (water).
Universe 4
Astronomy 20 10
The Moon
Near Side – Far Side
Orbital period – 27 days Rotation period – 27 days Synchronous rotation Noon to noon – 30 days Far side is not dark. Earth never sets.
Earthshine
Astronomy 20 11
The Moon
Size and Distance
Diameter: 1/4 x Earth LA to Chicago 13th largest world. 1/80 Earth mass Distance: 30 Earth diameters
Earth and Moon fromMars Global Surveyor
Astronomy 20 12
The Moon
Smallest Terrestrial Planet No atmosphere No geological activity.
Earth and Moon from Galileo
Universe 5
Astronomy 20 13
The Moon
Surface Geology
Highlands
Maria
Mare Crisium
Mare Imbrium
Oceanus Procellarum
Astronomy 20 14
The Moon
Full Moon
Tycho
Copernicus
Astronomy 20 15
The Moon
Topographic Moon
Big Backside Basin
MareOrientale
Lunar Highlands
Ocean of Storms Mare Humboldtianum
Universe 6
Astronomy 20 16
The Moon
Highlands
Bright. Mountainous Heavily
cratered 4 billion years
old.
Astronomy 20 17
The Moon
Impact Craters Rim Central peak Ejecta blanket Secondary
craters
EratosthenesCopernicus
Astronomy 20 19
The Moon
Impact Basins
>1000 km across. Bull’s eye Filled with lava flows.
Mare Orientale
Universe 7
Astronomy 20 23
The Moon
The Far Side
South Pole-AitkenBasin AKA “BigBackside Basin”
Astronomy 20 25
The Moon
Filled craters What's the difference?
Astronomy 20 26
The Moon
The Maria
Mare = sea Plural = maria Dark. Flat Lightly cratered. 4-3 billion years old
Mare Nubium
The Straight Wall
Universe 8
Astronomy 20 27
The Moon
Rilles
Rilles are lava channels on theMoon.
Hadley Rille
Hadley Rille close-up
Astronomy 20 28
The Moon
Mare Imbrium
1234
5
6
Impacts and volcanism
Which process produced thesefeatures?
Astronomy 20 29
The Moon
Lunar rocks
Highland breccia
Mare basalt
Highland anorthosite
Universe 9
Astronomy 20 30
The Moon
Regolith
Several meters deep. Erosion by micrometeorites.
Astronomy 20 31
The Moon
Apollo Missions(1969-1972)
6 missions 3 men each Apollo 11, 12, 14 -
walked. Apollo 15, 16, 17 –
rovers.
Astronomy 20 32
The Moon
Saturn V Rocket
Height: 313 ft Thrust: 7 million lb
Universe 10
Astronomy 20 33
The Moon
Command Module 3 men used on way to moon
Astronomy 20 34
The Moon
Lunar Lander(LM)
2 men Bottom
remained onMoon
Astronomy 20 35
The Moon
Lunar Roving Vehicle(LRV)
Length: 10 ft Range: 40 mi. Speed: 8 mph Power: two
36V batteries
Universe 11
Astronomy 20 38
The Moon
On the Moon Gravity 1/6 g No air No sound Dark sky 2 weeks daylight 2 weeks night Temp.: dry ice to
boiling.