answersLogoWhite

0


Best Answer

When the illuminated portion is decreasing from one night to the next, the moon is in its 'waning' phases.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: When the size of visible portion of the moon is decreasing the moon?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

When does the moon wax?

When the Moon is "waxing", it is increasing in visible size. This is between the new moon to the full moon. When the Moon is "waning" it is decreasing in size, from the full moon to the new moon.


What is the difference between a waxing phase and waning phase of the moon?

The waxing phase of the moon is the period of time between new moon and full moon, where the size of the illuminated portion of the moon is increasing. The waning phase of the moon is the period of time between full moon and new moon, where the size of the illuminated portion of the moon is decreasing.


What is the difference between a waxing phase and a waning phase of the moon?

The waxing phase of the moon is the period of time between new moon and full moon, where the size of the illuminated portion of the moon is increasing. The waning phase of the moon is the period of time between full moon and new moon, where the size of the illuminated portion of the moon is decreasing.


What is it said to be when the moon appears to be decreasing in size?

When the moon appears to be decreasing in size, it is called waning. When the moon appears to be increasing in size, it is called waxing.


During the waxing gibbous phase is the amount of illumination increasing or decreasing?

When the visible bright part of the Moon is increasing in size, the term "waxing" is used. When the visible part of the Moon is less and less illuminated each night, the term "waning" applies.


Is the gibbous is moon?

A gibbous moon is one of the phases of the Moon, when the size of the illuminated portion is greater than half but not a full Moon.


What is a waning in the moon?

This is when the moon is "decreasing" in size. Moving from a full moon to a new one


Size of the illuminated portion of planet or moon?

Exactly 50% of the moon is illuminated at any moment. As the moon revolves around the earth and its position changes, the fraction of that illuminated 50% that's visible to us on earth changes.


What was the moon phase for September 9 2009?

Around 25% illuminated, depending on where you were when you saw it.(Your position doesn't affect the size of the illuminated portion, but as time went on during the night, the actual visible portion of the moon was shrinking.)


Why do the earth and moon appear the same size?

Under what circumstance is this visible?


Moon decresing in size during the phases?

I'm assuming that you are intending to ask, "What is the decreasing moon phase called?" When the moon is getting smaller, it's referred to as "waning". When the moon is increasing in size, it's referred to as "waxing".


What is the gibbous?

A gibbous moon is one of the phases of the Moon, when the size of the illuminated portion is greater than half but not a full Moon.