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Seeing Stars

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Posted by Robert May on February 19, 2002 03:05:22 UTC

There are a few stars that are visible from the daylight. Needless to say, these are few and far between. There are also several planets visible in the daytime.
One of the conditions required is that the sky is very transparent as any background glow from water and dust will bring up the illumination so much that even Jupiter of Venus will not be visible, much less the Moon.
FWIW, one of the things done before the GPS system came about was doing celestial navigation by those few stars which do become a lot more visible at 30,000 feet of altitude and thus viewable by a medium sized scope and a CCD imager. Development on that system stopped after the GPS system became available.

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