Why do we know so little of dark energy?

>>7950519
>dark energy

>>>/x/

Darks don't matter

It's too dark to see it.

because it doesnt exist
like dark matter its a symptom of a bad model

>>7950538
At last I truly see

>>7950560
This

>Lol stupid Christian, making up God to explain things we can't see, le god of the gaps lol
>Hmm, we observe expansion but can't explain it, better fill that space with this mysterious dark energy

We don't have a light bright enough to see it

>>7950575
Didn't they make up the idea so they had something to search for? No competent scientist would state it is real but we need at least some idea of what we are looking for. If dark energy is not real then we will probably make up another possible cause. Not really equal to Christianity because they don't actively search for god and dark energy is not said to be true. Only plausible

>>7952349
Not really, the CMB power spectrum already tells us that there must be non-baryonic massive matter of (to us) unknown type - hence the name 'dark matter'. Then you combine that with rotation curve dilemma and other things, and you end up with the plausible, yet unsatisfying, hypothesis that there must be quite a bit of matter (that interacts gravitationally!!) distributed around in our galaxies, that we just can't see.

>>7950560
interesting tell us more anon

Dark energy is just the baseline curvature of the universe.
Fite me faggot

>>7950519
Because we have yet to come up with a physical theory that really explains it. Unlike dark matter (which we actually can say quite a bit about at this point, if not exactly what it's made of), dark energy is pretty much just a placeholder; we know there's *something* making the universe expand at an accelerating rate, and the most obvious way to do this is to put a cosmological constant back in to Einstein's equations. (A combination of energy and negative pressure permeating space at a constant density).

Also, it fits nicely into the inflationary hypothesis, which is ridiculously successful at explaining many different confusing features of modern cosmology, with the small problem that we don't know what the fuck the inflaton field is. But it would explain so many things if there was one, so we leave it in as a placeholder and work on either finding something to fill that role, or finding a different explanation.

Current theories have yet to find really good candidates for these things, and astronomy hasn't come up with anything useful either.

>>7950519
Because dark energy does not exist.

>>7952371
or maybe that just means the current explanation of gravity is fucked

old science: make new models when old ones are broken

new science: make shit up when our models are broken

>>7952667
>or maybe that just means the current explanation of gravity is fucked

We checked that too = modifications to gravity have been and are still being considered.

But whatever the deviation from predictions is, it really behaves more like some kind of extra matter. Colliding galaxies like the Bullet Cluster provide the best evidence - we can map their gravity by looking at the bending of light, and the resulting mass distribution looks just like there was some extra mass that just kept on going when the galaxies collided and is now offset from the visible matter.

Plus, many proposed explanations for problems in particle physics tend to also pop out non-interacting heavy particles that would provide excellent candidates for such matter if they were confirmed.

I wonder what people in the 1930s would have shitposted about on /sci/.
>fucking Pauli, making up an entire particle just because he's too stupid to explain beta decay

>>7952707
the entire war scene would have been hilarious shitposting

>>7952716
>GREAT MOMENTS IN 4CHAN HISTORY
>1 September 1931 - In a historic first that would prove to be typical of the board for years to come, Stormfags invade /pol/and, shortly to begin infesting other boards

File: 1452651393642.jpg (246KB, 627x502px) Image search: [Google]

246KB, 627x502px

>>7950560