6 - crescent. If more than half is visible, it is called...

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- (It is tilted by 23.5) - The Celestial Equator is determined by Earths daily rotation - The Ecliptic Plane is determined by the Earths annual orbital motion. - These two planes in the sky intersect the Equinoxes. Motion of the Moon In the course of one night, the moon rises and sets just like the sun. However, in the course of one month the moon appears different parts of the sky. It also changes its shape. Phases of the Moon - The moon goes through a set of phases approximately once every month. - In fact, the names “month” comes from the word “moon.” - The period of the phases, (from full moon to full moon) is 29.5 Earth days. The different phases have different names If the moon appears to be getting larger each night it is said to be waxing . If the moon appears to be getting smaller each night it is said to be waning. If less than half is visible, it is called
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Unformatted text preview: crescent. If more than half is visible, it is called gibbous. If the entire moon is visible, it is a Full Moon if none of the moon is visible, it is a New Moon. The Earth-Moon System Size Earth is 4 times larger than the moon Distance to Moon: 60 R earth Moon Phases-Half of the moon is always illuminated by the sun.-The fraction of this half we can see determines which phase the moon is in.-This depends on where the moon is in its orbit. Moon Phase Facts-The full moon is always opposite the sun.-So a full moon rises at sunset and sets at sunrise.-If the moon is between us and the sun, it appears crescent.-So, a crescent moon appears near the sun in the sky.-it can be seen just after sunset or before sunrise.-First Quarter is a good time to view the moon....
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This note was uploaded on 09/24/2011 for the course SCI 115 taught by Professor Mccarthy during the Spring '11 term at S.F. State.

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6 - crescent. If more than half is visible, it is called...

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