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Sun-Moon-Earth form a right triangle in this case.

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Q: How is the earth moon and sun lined up for the first quarter?
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Why does the moon change to a first quarter moon?

The sun reflects on the moon differently when the moon moves around the earth therefore, creating the change to a first quarter moon.


When does the first quarter phase occur?

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.


Where would the quarter moon be in relation to the earth?

When the moon is in the same direction of the sun, it is called a new moon. A week after the new moon, when the moon has completed about a quarter of it's turn around Earth, this is called the first quarter and about three weeks after the new moon and a week after the full moon, it is called the last quarter. If you visualise the moon turning around the Earth and imagine that the direction of which the sun is shining is called the "front' of the Earth, the the quarter moon would be at the 'sides' of the Earth and the full moon is at the 'back'.


When the sun earth and moon are lined up such that the full moon moves into earth's shadow?

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 moon and earth are lined up and the full moon moves into the earth's shadow?

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 the moon are lined up such that the full moon moves into earth shadow?

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.


What phase of the moon occurs when all of the moons near side is sunlit?

During the New moon, the lighted side of the Moon is the OTHER side, the side we never see.


What are the different phases of the moon are caused by the moon's near 28 day?

New Moon, First Quarter, Full Moon, and Last Quarter are the four phases of the Earth's Moon.


How is the sun the earth and the moon positioned during the first quarter moon?

They are at 'right-angles', with the Earth at the corner of the right angle.


What do you see of the phase of the moon first quarter?

You see the shadow of Earth cast upon the moon. The Sun's light creates the shadow and illuminates the quarter moon you see.


Why do we see different phases of the moon differently at different times of the month?

The phases of the moon consists of eight phase's first is New Moon, second Waxing Crescent, also first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent. "Why is there different phases of the moon " you ask. Since the moon revolves around us it passes by the sun which gives the moon light. If it is not close to the sun at all it makes a new Moon. If sun is on the right of the moon it is called a waxing crescent.When the sun is in the middle of the moon it is called a first quarter. Last five moon phases. Waxing gibbous is when the sun is about to be directly lined up with the moon but it steal has a little. when the moon is directly lined up it is a full moon.It all has to do with the position of the sun, the earth and the moon. The moon orbits the earth at a different speed then the earth revolves around the sun causing them to line up differently with the earth each day. This cycle repeats itself about every 4 weeks.Moon is reflecting soon beams to earth. If earth coveres the rays, nothing can reflect from moonThe moon itself cannot generate light. It is the sun light that the moon reflects. When a part of moon is behind the earth, the moon seems different; when the whole moon is shaded by the earth, an eclipse happens.


Where is moon when half lit?

The moon's phases result from the changing relative positions of the Earth, Moon, and Sun. It doesn't matter where the moon is when it's half-lit (or in its first quarter); its position relative to Earth and the Sun does matter, however. When the Sun and Moon are aligned on the same side of the Earth the Moon is "new", and the side of the Moon visible from Earth is not illuminated by the Sun. As the Moon waxes (the amount of illuminated surface as seen from Earth is increasing), the lunar phases progress from new moon, crescent moon, first-quarter moon, gibbous moon and full moon phases, before returning through the gibbous moon, third-quarter (or last quarter) moon, crescent moon and new moon phases.