Stellar aberration, the change in the apparent positions of more or less most of the night sky with the seasons, directly due to the velocity of the earth in its orbit. Note - aberration, which is related to the idea that raindrops appear to fall slanted in a moving vehicle, is not the same as parallax, e.g. has no relation to the distance of the stellar source, etc. :-)
See http://en.wikipedia.org/wiki/Aberration_of_light .
Predicted by Bradley in 1725. First measured > 0 by Bessel in 1838, with unpublished successful observations by Henderson 5 years earlier.
See http://thonyc.wordpress.com/2010/01/09/we-know-it-moves-but-can-you-prove-it/ .
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Stellar aberration, the change in the apparent positions of the night sky with the seasons, directly due to the velocity of the earth in its orbit. |
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