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the Moon
- Every night you can the the Moon, our good old satellite.
- But that is not really true.
- You can not see the Moon every night.
- When there is new moon, you can not see him. Why is that?
- The Moon revolves the Earth.
- Both, Earth and Moon are illuminated by the sun.
- So we can only see the Moon, when we can see the reflected sunlight.
- When is that happened?
- When is that not happened?
- It happens at any point of the revolution except one point.
- This point is when the Moon are exact in the line between Sun and Earth.
- Then the Sun illuminates the side of the Moon, who is not in Earth direction.
- So someone who stands on the Earth can not see the reflected sunlight - it is new moon.
- At any other time of the revolution at least some reflected sunlight will be seen by a person on the Earth.
- When the Moon is on the Sun-Earth line, but behind the Earth it is full moon and we can see the whole Moon hemisphere.
- brainfruit
May 2015
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