t seems to me that there really is no good analog for datrk energy. I suggest that we merely visualize dark energy as what it seems to be -- an intrinsic energy density present in space itself? In other words, simply regard each small volume of space as containing within itself a certian density of energy that is always maintaining an internal pressure that causes that volume of space to tend to expand to keep that internal pressure constant? As that volume of space containing objects such as galaxies expands, these objects are carried further apart. It seems to me that that model should be sufficient for whatever anyone wants to do in visualizing how dark energy causes space to expnd without stretching objects imbedded inside that space.