Sun-Moon-Earth form a right triangle in this case.
During a quarter moon, the Sun, Earth, and Moon are positioned at a right angle to each other. This alignment occurs when the Moon is either in its first quarter or last quarter phase, with the Earth located between the Sun and the Moon in the case of the first quarter, and the Moon positioned between the Earth and the Sun during the last quarter. As a result, half of the Moon's surface facing Earth is illuminated, creating the distinct half-moon appearance.
the cicle is new moon, waxing crescent,first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning cresent,then new moon again and so on so a first quarter moon is when you can't seehalf the moon.
The sun reflects on the moon differently when the moon moves around the earth therefore, creating the change to a first quarter moon.
From the first quarter moon face, the right side is the shining side. The first quarter moon occurs when half of the moon's face is illuminated and visible from Earth.
During a quarter phase of the Moon, either the first or third quarter, the Earth, Moon, and Sun are positioned at approximately right angles to each other. In the first quarter phase, the Moon is located between the Earth and the Sun, while in the third quarter phase, the Earth is between the Moon and the Sun. This positioning causes half of the Moon's surface to be illuminated and visible from Earth, creating the characteristic half-moon appearance.
First Quarter occurs when the moon is at right angles with respect to the Earth and sun. During this phase, the moon has completed one quarter of it's orbit around the Earth and an observer on Earth will see half of the moon illuminated.
A quarter moon, also known as a first or last quarter moon, appears as a half-circle or semicircle when viewed from Earth. During the first quarter, the right half is illuminated, while in the last quarter, the left half is lit. This shape results from the relative positions of the Earth, Moon, and Sun.
During the New moon, the lighted side of the Moon is the OTHER side, the side we never see.
New moon, first quarter, full moon and third quarter
When the Sun, Earth and Moon are lined up in such a way that the full moon moves into the Earth's shadow, it creates a lunar eclipse.
When the Sun, Earth and Moon are lined up in such a way that the full moon moves into the Earth's shadow, it creates a lunar eclipse.
When the Sun, Earth and Moon are lined up in such a way that the full moon moves into the Earth's shadow, it creates a lunar eclipse.