>
> That "angle" has nothing to do with gravity.
>
> Well, this is not correct.  Angle in not part of Newton's Universal Law
of Gravitation:
The force of gravitational attraction is directly dependent upon the masses
of both objects and inversely proportional to the square of the distance
that separates their centers.

So, angle of the sun is a visual effect of distance between sun and earth
hence there is a fluctuation in the gravitational force of the sun across
the seasons.  I have not carried the analysis (which would simply be
charting distance between sun and earth over time).  For there to be no
fluctuation the orbit of the earth around the sun would have to be a
perfect circle.  The orbit is an ellipse, hence fluctuation.  That bees may
be able to detect this fluctuation is plausible.

Aaron Morris - lovin' Physics!

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