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Meteorology         Charles A. Giannetta
                  Meteorologist - Professor 

...The Moon...






**Moon I of II**

1. The Moon is about 1/4 the size of the Earth.


2. Its diameter is 2,160 miles.


3. The Moon has less gravity then the Earth. You would weight 1/6


....as much as you do on the Earth.


4. There is no color in the moon's sky, and no sound on the moon 


....because the moon has no atmosphere. The moon's daytime 


....temperature reaches over 200 Degs. F. The 


....nighttime temperature drops to well below -200 degs. F. 






 Orbit**


1. The moon's orbit around the earth is an elliptical shape. 



2. The average speed of the moon around the earth in orbit is 
   2,300 mph. 


3. The Moon's average distance from the Earth is: 238,855 miles. 


4. At its farthest point (apogee) from Earth is: 251,968 miles. 


5. The closest point (perigee) from the Earth is: 225,742 miles. 



6. The moon completes one revolution around the earth in: 




  

  

    

      **29 days, 12 hours, 44 minutes, & 2.8 seconds.**
    



7. Due to the moon and earth's orbit, we see only one side of the 
...moon.






**The Moon's Phases**







1. As the moon orbits the earth we see it go through what are called 
moon phases.


2. The moon phases are caused by the amount of sunlight reflected off 


 
....its surface as it travels around the earth.


3. The reflectivity (albedo) of the moon is 


...7 percent. This means that the
moon reflects 7 percent of the sunlight it intercepts.


4. Here on earth it is known as moonlight.


6. The earth's reflectivity (albedo) is 30%.


5. If we were on the moon and went for a walk we would see a bright earth.,


...this would be know as earthlight.









**Moon Phases**





1. When the moon is between the earth and the sun, it is almost invisible,


...this phase is called:






**New Moon**







2. As the moon continues its journey around the earth, seven days later


...after the new moon it looks like a half circle, this is know as the:






**First Quarter**







4. 7 days later we can see all the moon, this is know as:






**Full Moon**



5. As the moon continues to revolve around the earth, seven days after the full moon 


....we again see on a half circle, this is know as the:






**Last Quarter**





1. When the moon progresses from new moon to full moon, this is know as:






**Waxing**





2. When the moon progresses from full moon back to new moon, this is
known as:






**Waning**




© 1998-2011 Charles A. Giannetta