Both the 1st Quarter moon and the 3rd (last) Quarter moon can be referred to as the "half moon" since we see half of the sunlit side of the moon.
It is called "first quarter" or "last quarter" when the moon is exactly half-lit.
In the first quarter moon, the round portion of the visible moon faces west (forming the letter D when viewed in the northern hemisphere). In the last quarter phase the round portion faces west.
This is when the moon is half visible
Half-moon during the first and third (last) quarter phases.
2. New Moon (little light); First Quarter (a half moon - will be a different half as viewed from the other hemisphere, because folk there are looking as if upside down); Full moon (very bright); Last Quarter, (another half moon.).
It is called "first quarter" or "last quarter" when the moon is exactly half-lit.
first or last quarter
In the first quarter moon, the round portion of the visible moon faces west (forming the letter D when viewed in the northern hemisphere). In the last quarter phase the round portion faces west.
Any profile of the moon between "half full" (first quarter) and "half full" again (last quarter) is "gibbous".
first or last quarter
First quarter and last quarter appear as a half moon. about halfway down this page are some pictures: http://www.calculatorcat.com/moon_phases/moon_phases.phtml
This is when the moon is half visible
Half-moon during the first and third (last) quarter phases.
first is the full moon then it is the last quarter then it is the new moon and the last one is the first quarter
2. New Moon (little light); First Quarter (a half moon - will be a different half as viewed from the other hemisphere, because folk there are looking as if upside down); Full moon (very bright); Last Quarter, (another half moon.).
We see a Half Moon illuminated. The name of this phase is called Last Quarter. First Quarter is 1 week before a Full Moon.
We see a Half Moon illuminated. The name of this phase is called Last Quarter. First Quarter is 1 week before a Full Moon.