[AngleWyrm]

Hypothesis: The effect known as gravity is instantaneous. Null hypothesis: The effect of gravity displays a finite transit delay (presumably comperable to speed of light).

Experiment: If light and gravity both arrive from the sun, then earth's trajectory through space should be a tangent to the center of the observed position of the sun, eight minutes west of current position. On the other hand, if gravity does not travel, then earth's trajectory should be a tangent to the sun's current position, eight minutes east of observed.

Is there a method of measuring earth's current trajectory by ameteur equipment? Could it be plotted via planetary positions or the like?