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| all types of electormagnetic radiation arranged according to wavelength and frequency |
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| process by which preipitaion that has fallen on land surfaces enters the ground and becomes groundwater |
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| telescope that uses lenses to focus visible light |
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| prercentage of sunlight that is reflected by the surface of a planet or a satellite such as the moon |
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| material that falls back to the lunar surface after being blasted out by the impact of a space object |
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| light colored mountainous heavily cratered area of the moon composed mostly of lunar breccias |
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| crater formed when space material impacted on moon's surface |
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| dark colored smooth plains on the moon surface |
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| long trail of ejecta that radiates outward from a moon crater |
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| layer of loose ground up rock on the lunar surface |
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| valleylike structure that meanders across some regions of the moon's maria |
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| farthest point in the moon's elliptical orbit to earth |
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| plane of earth's orbit around the sun |
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| time of year during which earth's axis is at a 90 angle to to the both hemisphere receive exactly 12 hours of sunlight and the sun is directly overhead at the equator |
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| when earth passes between the sun and the moon and earth's shadow falls on the moon occurs only during a full moon |
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| closest point in the moon's elliptical orbit to earth |
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| when the moon passes between earth and the sun and the moon casts a shadow on earth blocking earth's blocking earth's view of the sun can be partial or total |
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| period when the sun is overhead at its farthest distance either north or south of the equator |
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| the state at which the moon's orbital and rotational periods are equal |
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| the state of being opposed or hostile to another |
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| warm or intense in feeling passionate |
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| having little or no rainfall very dry |
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| to make less burdensome or less painful |
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