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McC 8Ch22 Sun-Earth-

McC 8 Ch22 Sun-Earth-Moon System

axis imaginary line around which the Earth spins
solar eclipse occurs when the Moon moves directly between the Sun and Earth and casts a shadow on Earth
Lunar Prospector launched in 1998 by NASA to continue photographing the Moon and collecting data
maria dark-colored, relatively flat regions of the Moon's surface formed when interior lava filled large basins
full moon all of the Moon's surface that faces the Earth is lit up
summer soltice occurs on June 21 or 22 in the northern hemisphere
sphere round, three-dimensional object such as Earth
revolution yearly orbit of Earth around the Sun
impact basins created when meteorites or other objects strike the Moon
Earth rotates on its axis about every day
waning crescent phase of the moon that immediately precedes the new moon
waning gibbous occurs after the full moon, a large portion of the Moon's surface is lit
magnetic north pole a north pointing compass needle faces this
lunar eclipse Earth is positioned between the Sun and the Moon casting a shadow on the Moon
solar eclipse Moon is positioned between the Sun and the Earth casting a shadow on the Earth
penumbra light-colored outer shadow on Earth's surface cast by the Moon during a solar eclipse
umbra dark shadow on the Earth's surface cast by the Moon duing a solar eclipse
cause of lunar eclipse Earth casts a shadow on the moon, occurs in full moon phase (sun-earth-moon)
cause of solar eclipse moon casts a shadow on the Earth, occurs in new moon phase (sun-moon-earth)
Does the solar eclipse or the lunar eclipse have a larger umbra? Why? Lunar - Earth larger than Moon and casts a larger shadow on the Moon than the Moon casts on the Earth during a solar eclipse
How does the Earth's tilt lead to seasonal changes? hemishpere tilted toward the sun has higher temperatures(summer) than when it is tilted away(winter)
Plane of the Ecliptic apparent path the sun travels in the sky, along which the planets orbit and the zodiac constellations are found
circumpolar constellations constellations that appear to rotate around Polaris and never dip below the horizon
examples of circumpolar constellations Draco, Cassiopeia, Cepheus, Ursa Major, Ursa Minor
Celestial Equator the projection of the Earth's equator into space
location of the Celestial Equator & Plane of the Ecliptic during a Solstice they are farthest apart during a solstice (sun is farthest away from the equator)
location of the Celestial Equator & Plane of the Ecliptic during an Eclipse they intersect during an eclipse (sun is above the equator
Earth's Rotation 24 hours, spin on axis, causes day and night
Earth's Revolution 365.25 days, orbit around the Sun
asterism a smaller star pattern within a constellation Ex. Big Dipper, Little Dipper
During which moon phase does a lunar eclipse occur? Full Moon
How was the moon formed? Impact Theory - large object struck Earth and material that was thrown off formed the moon
Created by: MCJH