Do you think some planets atmospheric pressures are one of the greatest forces in a Vacuum.?

Work on this Q&A astrophysics design. Scratch your head and do some deep breathing then thinking...( Some of the greatest pressures in the Universe happen in space. ( Both in Fission and Fussion physics ) Creating, a not yet measured amount of Energy. Unlike what we deal with here on Earth...Raising a eyebrow to what is and what can be ?