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5 Cards in this Set

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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.

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.

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.

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.

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.

Waxing Crescent


The moon is less than one-half illuminated by the sun but less than one quarter illuminated.

First  Quarter 
The moon is less than one-half illuminated by the sun but less than one quarter illuminated.

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.

Waxing Gibbous


The word gibbous refers to phases where the moon is more than half illuminated.

Full Moon
 the phase of the moon in which its whole disk is illuminated.

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.

Waning Gibbous


Waxing essentially means "growing" or expanding in illumination, and waning means "shrinking" or decreasing in illumination.

3rd/Last Quarter 
 the instant, approximately one week after a full moon, when half of the moon's disk is illuminated by the sun.

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.

Waning Crescent


Waxing essentially means "growing" or expanding in illumination, and waning means "shrinking" or decreasing in illumination.