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Inserting dark energy where push is needed to make the universe expand at the rate it does help in building on higher level theories and hypothesis, but I was wondering, how many people actually believes there is such a force compared to simply not understanding gravity and other "normal" forces completely?

The same with dark matter - it makes the maths work out nicely in predicting or reversing the rotation of galaxies, and in this sense use it by all means, but really - don't you think it's just a matter of we're not entirely understanding gravity and other physics at such huge scales? Einstein fine tuned a lack in Newtons' theories on gravity on a stellar scale, maybe theres more finetuning needed for a galactic scale?

It just sounds like another string theory...

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The trouble with string theory is that the theory itself can be modified an infinite number of ways to account for just about anything.

Also at this point it has no predictive value for anything that can be directly tested.

Dark energy and dark matter sound like cool names but basically they are just the nomenclature assigned to describe observations of invisible mass & an anti-gravitational effect observed in the cosmos.

You could just as easily called them the Mickey Mouse and friends effect.

Since mass-stuff is the only known thing that produces a gravity field and since we don't have a clue the nature of exactly what this unobservable (so far) extra mass-stuff is...the term 'Dark Matter" almost applies itself.

Pesse (Isn't String Theory a way to help remember stuff while on an errand?) Mist

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