The Moon
Facts about the moon… 1/6th of Earth’s gravity -12.5 magnitude Light from moon is reflected light from the sun. 11%. The rest is absorbed.
Facts about the moon… No atmosphere No air No water Extreme temperatures -280 to 250!
Facts about the moon… Long days 14 Earth days/Earth nights Smaller than the Earth No sound
How did the Moon form? Impact-ejection hypothesis…or…The Big Whack! 1) Earth was hit by a large object (Mars size) 2) Debris from the impact went out to space (super-hot vapor) 3) Debris eventually formed moon over time due to gravity. (30,000 years)
Facts about the moon… 240,000 miles from the Earth
Moon Rotation The Moon has a synchronous rotation with the Earth = we always see the same side of the moon. 27.3 day rotation
History of the Moon Used for hunting/farming Tides Calendar “month” comes from moon. Galileo identified light and dark areas… Lots of folklore/mythology
Dark areas of the moon- thought they were oceans Features of the Moon Mare/maria (sea) Dark areas of the moon- thought they were oceans Dry lava beds
Highlands-Light areas of the moon. Ancient lunar crust. Features of the Moon Highlands-Light areas of the moon. Ancient lunar crust. Named for famous mountain ranges on Earth (Alps)
Craters- from meteorite impacts. Named after famous scientists. Features of the Moon Craters- from meteorite impacts. Named after famous scientists.
Over time… The moon was continually pelted with meteorites leaving it cratered Last 3 billion years relatively quiet… Now the moon is essentially dead
Space Exploration 6 U.S. Apollo missions from 1969-1972. 837 lbs of moon rock. “The Eagle has landed”- Sea of Tranquility Moon quakes
Powdery soil- from shattering rock during bombardment. Neil Armstrong July 20, 1969. Powdery soil- from shattering rock during bombardment.
The footprints will always remain
Lunar Spud
Lunar Halo Caused by ice crystals in the Earth’s atmosphere that are refracted in the light.
Moon Illusion
Harvest Moon Full moon near the equinox. Rises earlier than normal to give extra light for farmers.
Colored moon Dust in the atmosphere refracts and makes the moon appear colored.