what is relation bet'n vaccume & gravitation?

Answer 1

The only relation between gravity and vacuum is that bodies with large gravitational fields (i.e. planets) are able to exert enough attraction to their local space that gaseous material remains trapped in their gravity well.

This gives large planets an atmosphere, which is pretty much the only time you don't have vacuum in this universe.

How much atmosphere a planet can retain depends on how much gravity it exerts. Jupiter is massive enough to retain even extremely small gas molecules like hydrogen and helium (which eventually escape from Earth's atmosphere when they are generated). A smaller planet like Mars may have difficulty even keeping oxygen (Mars' very thin atmosphere now is almost all carbon dioxide, which is heavier than O2).

Other than that, there's no real relation. You could easily have a vacuum in an intense gravitation field, and you can have an atmosphere with no gravity as long as you have a sealed container to keep it from leaking into space.

Answer 2

A vacuum is a measurement of ZERO PRESSURE relative to atmospheric pressure. Gravity is actually the curvature of space and time where 3 dimensional space is displaced where there is a mass in that space...literally curving it into a 4th dimension....much like the way a heavy ball placed ontop of the surface of a matress will curve that surface from a 2 dimensional plane into a 3 dimensional implosion in that surface.

Answer 3

The difference is this : nature abhors a vaccum [not vaccume]whereas gravity is not just nature[ newton's apple], it is cosmic, encompassing solar systems.
Hence there is no relation between gravity and vaccum.