The Moon. Exploring the Moon. Satellites are used to identify Lunar features and resources There is an abundance of information about the moon because it is closest to the Earth. Lunar Properties. Earth’s moon is unique among all other moons in the solar system. Largest moon
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Exploring the Moon Satellites are used to identify Lunar features and resources There is an abundance of information about the moon because it is closest to the Earth
Lunar Properties • Earth’s moon is unique among all other moons in the solar system. • Largest moon • Composition is a solid and rocky, as compared to the icy composition of other moons • Earth’s moon is close in proximity
Phases of the Moon • new moon:occurs when the moon is positioned between the earth and sun. The entire illuminated portion of the moon is on the back side of the moon, the half that we cannot see. • Full moon: the earth, moon, and sun are in alignment, just as the new moon, but the moon is on the opposite side of the earth, so the entire sunlit part of the moon is facing us.
Phases of the Moon • The first quarter and third quarter moons (both often called a "half moon"), happen when the moon is at a 90 degree angle with respect to the earth and sun.
Phases of the Moon • Crescent:refers to the phases where the moon is less than half illuminated. • Gibbous:refers to phases where the moon is more than half illuminated. • Waxing: means "growing" or expanding in illumination • Waningmeans "shrinking" or decreasing in illumination.
Phases of the Moon • After the new moon, the sunlit portion is increasing, but less than half, so it is waxing crescent. • After the first quarter, the sunlit portion is still increasing, but now it is more than half, so it is waxing gibbous. • After the full moon (maximum illumination), the light continually decreases. So the waning gibbous phase occurs next. • Following the third quarter is the waning crescent, which wanes until the light is completely gone -- a new moon.
Eclipse • Solar Eclipse: when the moon passes directly between the sun and the Earth and blocks the sun from view.
Eclipse • Lunar Eclipse: occurs when the moon passes through the earth’s shadow • Can only happen when there is a full moon
Eclipse • Like solar eclipses, lunar eclipses do not occur every full moon because the Moon in it’s orbit usually passes above or below the Sun as seen from Earth.