What is Dark Energy?

[Kbertsche]

and it looks like the mainstream fuddy duddies are agin' it! That is usually a clue that they are on the right track. Upending the status quo. Everyone mocks and say no, and then eats crow. Happens with every new revolution in science. Doesn't mean that this guy is correct, but whatever IS correct will be sure to upset the entrenched scientists with a stake in the old ideas.

We'll see. Overthrowing a paradigm in physics takes more than just a new idea; the new idea must be mathematically defensible and derivable from first principles. I don't believe any MOND theory fits these requirements at present.

[Sparko]

explain what MOND is, please.

[JonathanL]

explain what MOND is, please.

It's what's left of Monday after you remove the "ay" from it.

[Kbertsche]

explain what MOND is, please.

See post #21.
MOND=MOdified Newtonian Dynamics (essentially the same as non-Newtonian gravity, i.e., a gravitational force which does not fall off as 1/r^2).

[The Lone Stranger]

I think Sparko is spot-on about dark matter. Way out there light is bending, but there is not detectable matter around to bend it, so to keep our high school and college physics textbooks around, we have to come up with something to explain why light is bending when there is nothing there. So, we create a new type of matter that we can't see because it doesn't reflect light. We have no way of knowing that it's there; we just create it to allow the laws of physics to work the same way out there. My problem other than the obvious is if light is not reflected, then it's absorbed. And if absorbed, how can that unique mass handle all of that energy?

As a bit of an aside, not to be too critical this hypothetical construct idea. it is fairly consistently used in many disciplines. The idea of the subconscious or unconscious is simply a construct created by Freud and Jung to attempt to explain a lot of head stuff.