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5 Cards in this Set
- Front
- Back
Lunar Movement An introduction to the eastward motion of the Moon among the stars during the course ... Moving once around in 27.3 days, its average movement is about 13.2 degrees per day, or 92 degrees per week. |
Moon Phases The lunar phase or phase of the moon is the shape of the illuminated (sunlit) portion of the Moon as seen by an observer on Earth. |
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New Moon the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent. |
Waxing Crescent The moon is less than one-half illuminated by the sun but less than one quarter illuminated. |
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First Quarter The moon is less than one-half illuminated by the sun but less than one quarter illuminated. |
Waxing Gibbous The word gibbous refers to phases where the moon is more than half illuminated. |
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Full Moon the phase of the moon in which its whole disk is illuminated. |
Waning Gibbous Waxing essentially means "growing" or expanding in illumination, and waning means "shrinking" or decreasing in illumination. |
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3rd/Last Quarter the instant, approximately one week after a full moon, when half of the moon's disk is illuminated by the sun. |
Waning Crescent Waxing essentially means "growing" or expanding in illumination, and waning means "shrinking" or decreasing in illumination. |