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Astronomical question and answer 224

 

Frank L. Preuss

 

What is the difference between the moon one sees at night and that moon, one sees during the day?

 

Today I observed the moon a couple of hours before sun rise. It is two days after full moon and the moon is still quite full; only the lower edge is a little frayed, because the sun no longer stands directly opposite it, but the angle between them has now become smaller than 180 degrees.

Now the sun shines already and the moon still stands far above the horizon and its surroundings are now no longer black, but blue.

The difference is that the moon is a heavenly body at night, which radiates light; and that to such a degree, that this light illuminates the earth and even casts a shadow; and during the day it is just a round disc, which is white and has darks spots, and does not stand out much against the blue surroundings.

At night the moon, particularly the full moon, one can hardly overlook, when the sky is clear, and during the day one has to already consciously look out for it, when one wants to see it.

Now it is about half an hour before moonset and I still see it, because I know, where it is found; if I would not know it, I probably would have overlooked it, when I would not have searched for it consciously.

 

This is the end of "Astronomical question and answer 224"
To the German version of this chapter: Astronomische Frage und Antwort 224

 

 

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