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Astronomical question and answer 201

 

Frank L. Preuss

 

What differences are there between the observation of the rising old moon and the rising new moon?

 

When I observe the rising old moon, therefore the waning moon in the last phase, therefore shortly before the theoretical new moon, therefore when the crescent of the moon has already become every little, but is still seen quite well, then that is a situation, where the moon and the sun are quite close together and therefore rise so about at the same time. And so it is also with the rising of the new moon, the first phase of the waxing moon.

And the main difference is the sequence.

With the old moon the moon emerges first and after that the sun and with the new moon I first see the sun and only later the moon comes up at the horizon.

And the main difference here is again the light conditions.

With the old moon rising I can observe the moon a short time, when it is still relative dark, perhaps still night, and can therefore see the moon much better, than when the sun shines, above all I can see that part of the moon, which is not shone on by the sun.

And with the setting it is the other way round; there I can a short time see the new moon better, when the sun has already set.

 

This is the end of "Astronomical question and answer 201"
To the German version of this chapter: Astronomische Frage und Antwort 201

 

 

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