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Because lunar eclipses happen when the Earth's shadow falls on the moon, hiding it from the sun's light. For this to happen, the moon must be on the opposite side of the Earth from the sun, so the full half of the moon that is lit by the sun is visible from Earth. That is what full moon is.

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7y ago
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12y ago

The full moon occurs when the entire sunlit side of the moon is facing earth, which means that the moon must be pretty much on the opposite side of earth as the sun is. The lunar eclipse occurs when the passes behind earth (from the sun's perspective) and earth casts a shadow on it.

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Q: Why lunar eclipses occur on full moon days?
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What is the only lunar phases in which a lunar eclipse can occus?

Lunar eclipses can only occur at the full moon.


What phases the moon is in during a lunar eclipse?

Lunar eclipses always occur at the full moon, while solar eclipses can only happen during a new moon. thats a horrible answer , you could get that from watching twilight once.


Which moon phase do solar eclipses happen?

Solar eclipses can only occur at the new moon, while all lunar eclipses happen at the full moon.


Can a lunar eclipse occur during the quarter moon phase?

No, it cannot. Lunar eclipses (they really aren't even true eclipses) can happen only during full moon.


How often do eclipses naturally occur?

There are two main types of eclipses: solar and lunar. Lunar eclipses occur every 6 months. Solar eclipses occur 2-5 times per year. Eclipses can be partial or total. Partial eclipse covers only part of the sun or moon, while total covers the full entity.

Related questions

When can Eclipses of the Moon occur?

Lunar eclipses occur precisely at the full moon.


Do lunar eclipses occur at a new moon or at a full moon?

At a full moon.


What is the only lunar phases in which a lunar eclipse can occus?

Lunar eclipses can only occur at the full moon.


What type of lunar eclipse appears to be the least common in north america?

Lunar eclipses can only occur when the moon is in full phase. The least common of these eclipses is a full lunar eclipse.


A lunar eclipse only occurs at what node?

Lunar eclipses only occur at the full moon.


Are there full and partial lunar eclipses?

yes there are full and partial lunar eclipses


Do solar eclipses occur at full or new moon?

New moon (the Earth goes into the shadow of the Moon) Lunar eclipses occur at full moon (the Moon goes into the Earth's shadow)


What phases the moon is in during a lunar eclipse?

Lunar eclipses always occur at the full moon, while solar eclipses can only happen during a new moon. thats a horrible answer , you could get that from watching twilight once.


Which moon phase do solar eclipses happen?

Solar eclipses can only occur at the new moon, while all lunar eclipses happen at the full moon.


Can a lunar eclipse occur during the quarter moon phase?

No, it cannot. Lunar eclipses (they really aren't even true eclipses) can happen only during full moon.


How often do eclipses naturally occur?

There are two main types of eclipses: solar and lunar. Lunar eclipses occur every 6 months. Solar eclipses occur 2-5 times per year. Eclipses can be partial or total. Partial eclipse covers only part of the sun or moon, while total covers the full entity.


Do lunar eclipses occur when the new moon is on the ecliptic?

Almost. It's when the Full Moon is on the ecliptic.