Movements and phases of the Moon The Moon is the Earth's only satellite. Its diameter is approximately one quarter of the Earth's diameter. The Moon moves in two ways: Rotation: the Moon rotates around its own axis. Revolution: the Moon orbits the Earth . Both movements take 28 days. This is why the same side of the Moon always faces the Earth . This is how we see the phases of the Moon from the Earth : 9 WORK WITH THE IMAGE. What does this image represent? Explain. 10 Why do we see the Moon all night long when it is full? Why do we not see it all night long when it is waxing or waning? 11 D uring which phase of the Moon do eclipses of the Sun take place? What about lunar eclipses? 12 H ow often can eclipses take place if the Moon's orbit coincides with the Earth's orbit? 2. The Earth-Moon system Full Moon The Earth is between the Sun and the Moon . Waning Moon The Earth , the Sun and the Moon form a right angle. The Moon's left side is illuminated by the Sun . Waxing Moon The Earth, the Sun and the Moon form a right angle. The Moon's right side is illuminated by the Sun. New Moon The Moon is between the Earth and the Sun . Lunar orbit CHALLENGE
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