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Astronomical question and answer 237

 

Frank L. Preuss

 

When one has a look at this picture

eclipse,

why does a solar eclipse and a lunar eclipse cannot then take place on one day. The one during the day and the other during the night?

 

Because the earth turns around itself in one day, but not the moon around he earth.

The moon does not turn around the earth once a day.

Also the earth has, as a result that it turns around itself once in a day, nothing to do with it.

Also the moon, as a result that it always turns the same side towards the earth, therefore not like the earth, turns around itself once a day, has nothing to do with it.

The moon takes one month to turn once around the earth. And for half a rotation it takes half a month. It therefore takes about 14 days until the moon comes to the other side.

That the moon apparently turns once a day around the earth does not happens for that reason, because the moon really revolves round the earth once a day, but because the earth turns around itself once a day.

Also the sun does not revolve once a day around the earth. We only have the impression that it does so. The whole starry sky rotates only seemingly once a day around the earth; what really rotates are we, the observers, on the surface of this planet.

A solar eclipse can only happen at new moon. A lunar eclipse only at full moon. And between such a new moon and such a full moon is at least half a month.

A solar eclipse can only take place during the day. A lunar eclipse only at night.

 

This is the end of "Astronomical question and answer 237"
To the German version of this chapter: Astronomische Frage und Antwort 237

 

 

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