Can Energy Density in Deep Space Vacuums Be Measured?

[wolram]

If one could find the deepest void in space, could the energy in a set volume be measured calculated?

Edit.

 

[wolram]

Is this a nonsense question? i will try again if you think so.

 

[SpaceTiger]

The energy density of the dark energy is extremely small and, at the moment, it's only feasible to measure its effects on very large scales. A great many cosmological studies are currently devoted to measuring these effects (e.g. type Ia supernovae, gravitational lensing surveys).