[RightWhale]

Dark energy is like gravity, except it pushes rather than pulls.

[KayEyeDoubleDee]

Dark energy is just like gravity, except it pushes rather than pulls.

Equating "energy" to "gravity" doesn't make much sense too me. If it is truly a repulsive force (in which case they should have called it something like "dark gravity" or URF, Unknown Repulsive Force) then what does it act on? What does it push? Normal matter? Dark Matter? The "fabric" of space-time? Or is it really just another Einsteinian Comsmological Constant, plucked out of thin air to explain the unexplained.