  The Voyager spacecraft are providing the first in situ measurements of
physical properties in the outer heliosphere beyond the heliopause. These data,
together with data from the IBEX and HST spacecraft and physical models
consistent with these data, now provide critical measurements of pressures in
the heliosphere and surrounding interstellar medium. Using these data, we
assemble the first comprehensive survey of total pressures inside and outside
of the heliopause, in the interstellar gas surrounding the heliosphere, and in
the surrounding Local Cavity to determine whether the total pressures in each
region are in balance with each other and with the gravitational pressure
exerted by the Galaxy. We inter-compare total pressures in each region that
include thermal, non-thermal, plasma, ram, and magnetic pressure components. An
important result is the role of dynamic (ram) pressure. Total pressure balance
at the heliopause can only be maintained with a substantial contribution of
dynamic pressure from inside. Also, total pressure balance between the outer
heliosphere and pristine very local ISM (VLISM) and between the pristine VLISM
and the Local Cavity requires large dynamic pressure contributions.
