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Astronomical question and answer 233

 

Frank L. Preuss

 

Can one see the moon one a day before new moon?

 

In answer 205 it says: "Today it was overcast the whole day. What does this situation tell me? That I now cannot say, today, one day before new moon, whether one can still see a crescent of the moon on such a day."

That was one month ago.

Today now is again one day before new moon and I went outside the door and saw immediately the moon crescent in the sky. It is before sunrise and the crescent is very clearly visible and also the part unlit by the sun was visible, since it is illuminated by the earth shine, and also the edge of the unlit part of the moon.

I now went out a second time. Dawn has progressed. The crescent of the moon is still visible, now considerably weaker. It directly points downwards, towards the sun, which is still below the horizon. The rest of the moon disc, which is not illuminated by the sun, is now blue, as the sky surrounding it, therefore no longer visible.

Now I have been outside a third time. The moon was no longer visible, despite the sky also now being again without clouds in that area. A star, which I had also seen at the first two times, was still visible, but very weakly. There were clouds at the horizon. The sun still did not seem to have risen.

 

This is the end of "Astronomical question and answer 233"
To the German version of this chapter: Astronomische Frage und Antwort 233

 

 

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