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how can the acceleration of Earth with respect to Sun be measured? Of
course, it is quite easy to *calculate* an estimate using high school
physics but I wonder what methods might exist for a "direct"
measurement of the acceleration? By "direct" I mean how to measure it
if we didn't know that Earth revolves around Sun :-).
Also, how can we measure "directly" the acceleration due to rotation
of Earth around its axis, say, on the equator. For instance,
Foucalt's pendulum and the coriolis effects can be used for this
purpose but there must be other ways as well?
We don't "feel" directly either of the above accelerations whereas in
a merry-go-around acceleration (or more properly: the effects of
non-inertial reference frame) can be "felt".