APOD: Lewins Challenge: 360 Degree Star Trails (2011 Jul 17)

[Chris Peterson]

Some time ago, quite possibly a few years, prof Lewin issued a challenge to APOD viewers to explain a light issue with a photograph, possibly taken by prof Lewin himself, that had a misterious light source location. I have been following APOD for many things and some of them I have in the back of my mind as " no answer ". Perhaps someone can enlighten the vast audience, namely me, as to the answer to that puzzle.. An ice cold one would be nice for a reward.

Here is the APOD in question and here is Lewin's answer. More here.

[bystander]

Some time ago, quite possibly a few years, prof Lewin issued a challenge to APOD viewers to explain a light issue with a photograph, possibly taken by prof Lewin himself, that had a misterious light source location. I have been following APOD for many things and some of them I have in the back of my mind as " no answer ". Perhaps someone can enlighten the vast audience, namely me, as to the answer to that puzzle.. An ice cold one would be nice for a reward.

Here is the APOD in question and here is Lewin's answer. More here.

http://asterisk.apod.com/viewtopic.php?f=9&t=59