The moon

The moon

اسلاید 1: How are they different?By the Lunar and Planetary InstituteFor use in teacher workshopsMoon Formation / Processes

اسلاید 2: Earth7930 miles (12,756.3 km) diameter 23 degree axis tilt (seasons!)Surface temps –73 to 48 C (-100 to 120F)Thick atmosphere, mild greenhouse effect Liquid water – lots! - at surface2160 miles (3476 km) diameter7 degree tilt (~no seasons)Surface temps - 107 C to –153 C (224 F to –243 F) No atmosphere No liquid water … Ice at poles in shadows?Moon

اسلاید 3: EarthMoonNo Magnetic FieldSmall Moon QuakesSmall, Offset Core

اسلاید 4: Lunar Interior StructureCopyrighted, LPI

اسلاید 5: Earth’s MoonHow did our Moon form?What’s been happening since?

اسلاید 6: A few data to ponder ….Lower density – “lighter” - relative to planetsLess iron than whole Earth, more aluminum and titaniumMoon’s chemical signature ~ Earth’s mantle

اسلاید 7: How Did the Moon Form?A few more data to ponderDoes not orbit in equatorial plane of Earth, or eclipticEarth/Moon - high angular momentum

اسلاید 8: Lunar Formation ModelsThe moon is a sister world that formed in orbit around Earth as the Earth formed. The moon formed somewhere else in the solar system then was captured into orbit around Earth. Early Earth spun so fast that it spun off the moon.