In physical cosmology and astronomy, dark energy is a hypothetical form of energy that permeates all of space and tends to accelerate the expansion of the universe.

http://en.wikipedia.org/wiki/Dark_energy

Dark energy is said to be over 74% of the universe yet we know nothing about it. It would be like knowing everything about earth but not being able to figure out what water does. Dark energy is likely within all of us wi within the space and nothingness.

So who can we say created this energy? Satan? Why?

I thought dark energy is astronomy i.e. the stars and galaxy et al (shrug shoulders)

Omo Alata: I thought dark energy is astronomy i.e. the stars and galaxy et al (shrug shoulders)

Its a form of energy under the galaxy....Check the link sha