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lunar eclipses and phases of the moon
The Moon and eclipses
Motions of the Moon
revolves around Earth in about twenty eight days.
In the same time, The Moon also rotates in very peculiar way: The Moon
spins on its axis showing always the same side to the Sun, and keeping
the other side in the shadow: they are calles the " bright side " and
the " dark side ".
Depending on the position of the Moon, we can see various parts of the
bright side of the moon.
The different aspects the Moon takes during its revolution around the
Earth are called "phases of the Moon"
These are the main phases of the Moon:
When all the bright side can be seen: full Moon.
- When the bright side can't be seen at all: new Moon.
- When we can see only half of the bright side: Quarter of Moon.
ceases to be lighted by the Sun when it penetrates in the shadow cone
of the Earth: this an eclipse of Moon
There are two kind of Moon eclipse:
- If The whole Moon penetrates in the shadow of Earth then it is a
total eclipse. The bright side of the Moon can't be seen at all.
- If only a part of the Moon penetrates in the shadow of Earth then it
is a partial eclipse. Only a part of the bright side disappears during
eclipse can happen only if the Sun, the Earth and the Moon are aligned.
A lunar eclipse is therefore possible only at the full Moon. Nevertheless
there is no lunar eclipse at every lunar cycle because the revolution
plane of the Moon does not coincide completely with that of Earth
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