Quote Originally Posted by jwilliams View Post
What is the dark energy? I know this is not the easy question, but I really want to get the answer.
The farthest that my layman's brain could get on it is that it's the default tendency of empty space to expand when not acted upon by a dominant gravity field. It's more a property of space itself than it is actual stuff i.e. dark matter. Dark matter to me is far more mysterious.