The Naked Scientists

The Naked Scientists Forum

Author Topic: What is dark energy?  (Read 684 times)

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
What is dark energy?
« on: 21/10/2016 17:33:02 »
Dark energy is the force that is driving the accelerating expansion of the universe.  It is so far unobserved, and mechanically unaccounted for, but must exist in order for GR to be mathematically correct, and describe the expansion of the universe.  Its value is thought to be that of the cosmological constant that Einstein retracted from his theory of General Relativity.


 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #1 on: 21/10/2016 17:41:16 »
Do what?  Are your telling me that the whole basis of our best working theory of gravity is hinged on a force that is not observed, nor mechanically accounted for?  What utter bollocks and drivel...  You really are not making a lot of sense here.  Absolute rubbish.  You should be ashamed of yourself trying to pass of such idiocy as mainstream science!  What, just cos the maths demand that it is so, this gives leave to invent phenomenon?
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #2 on: 21/10/2016 18:52:34 »
But maths are physics darlin' Everyone knows that!
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #3 on: 21/10/2016 19:23:17 »
Naom Chomsky wept*, what on earth are you talking about?  Are you some kind of idiot?

You cannot possibly imagine that Hubble strapped a space suit on and physically checked those red shift velocities can you?  Although to say so he probably would have got some woman in the background doing it and then claimed the credit, knowing Hubble...

Maths are not physics you imbecile.  Just like oranges are not apples.

*(movie reference, "Captain Fantastic"... Well worth a watch)
« Last Edit: 21/10/2016 19:26:56 by timey »
 

Offline evan_au

  • Neilep Level Member
  • ******
  • Posts: 4130
  • Thanked: 249 times
    • View Profile
Re: What is dark energy?
« Reply #4 on: 21/10/2016 19:30:22 »
The accelerating expansion of the universe is an observation which could have many causes.

Dark Energy is one of the theories trying to explain that expansion. And there are a number of theories about what Dark Energy is.

A multiplicity of mainstream theories is, in itself, a sign that scientists don't really know what is going on. And they would love to find out (please approve this grant application...). 

But if your world view cannot handle the fact that many things in science are unexplained, then you should lock yourself in a little room where you can explain everything that goes on. And don't let anyone else in, because the workings of the human brain are very poorly understood - and the function of many segments of human DNA is still unknown.
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #5 on: 21/10/2016 19:53:06 »
...(chuckle) - grant application approved...

But although I am quite sure that I have more than my fair share of Neanderthal geno, and that I have slightly more strands clumping together of autistic patterns than average, I'm pretty sure that the overly large helping of empathy that my geno has seen fit to equip me with will ensure that I do not explore too deeply into anyone else's brain - although if it were not for this empathy I would undoubtedly be a total sociopath, because, to quote Cyprus Hill "here is something you won't understand, I could just kill a man"... and self preservation will indeed stop me cutting into my own!

Never mind the bollocks the OP is twatting on about...

What interests me is the DNA connection you make to dark energy.  Fascinating...  I am assuming the dark room is the key factor, but if you would be so kind as to explain?
« Last Edit: 21/10/2016 20:22:57 by timey »
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #6 on: 21/10/2016 20:19:29 »
Well usually I would not dare to cast aspersions on a post that Evan makes, but in this case Evan you are wrong!

Relativity is a tried and tested theory.  If it were not for relativity we would not have GPS.  Personally I think that the Hadron Collider is not long enough.  It should be extended significantly (I have relatives close by, they could use the work), ...and then we would find this dark energy, no problem...

...and could you both please stay on topic?  It is ludicrous to suggest that DNA and dark energy can occupy the same discussion.
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #7 on: 21/10/2016 20:40:08 »
You know I really am getting sick and tired of watching you insult the trained and professional people here trying to help you...  Evan has explained to you that dark energy is just a theory, and you completely ignore him.  You act as though the remit of relativity is the be all and end all of science.  Clearly there are many extremely clever people who suggest it is not.  Are you going to ignore them all?

...and clearly if there is dark energy, then it will be present in a dark room that contains a human who contains DNA.  There are absolutely no limitations whatsoever to conversational combinations you know...
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #8 on: 21/10/2016 22:25:16 »
I'm not insulting anyone!  How can Evan be helping me when he clearly doesn't believe in relativity?  Anyone who doesn't believe in relativity is wrong! Anyone who questions the remit of relativity obviously hadn't understood the subject... Really, I'm not lying.  Go to any science and physics forum and question relativity, you'll soon find out.
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #9 on: 21/10/2016 22:54:44 »
...and therein lies your problem darlin'...  The word belief.  Science is not about belief.  If someone suggests to you some other concept that is not relativity, you cannot state that concept as wrong because it is not relativity.  And if you can state it as wrong, first you must ask yourself the question, this concept is wrong relative to what?  And if you find it wrong relative to a theory, then you have not found it to be truly wrong.  Only in relation to experiment and observation can a concept be found truly wrong...

And even then one must examine the remit of the current interpretation of experiment and observation, especially if one is considering a concept or concepts that are very closely related to relativity, and clarify that the data cannot be viewed differently.  ie: Hubble's redshift velocity observations run into problems in the observation of a star cluster known as Stefan's quintet.  The need for dark energy is based on Hubble's velocities...

See darlin', already there is a crack in the certainty - so where does belief fit in?
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #10 on: 22/10/2016 03:25:16 »
Well I wouldn't say it was a crack as such - the 5th star anomaly is for certain due space dust interference...  I wouldn't pay it much attention really...nobody else does.
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #11 on: 22/10/2016 04:53:06 »
Oh dear - luminosity may be a problem as well...

http://www.sci-news.com/astronomy/science-universe-not-expanding-01940.html

Blame this on space dust will you?  If you aren't going to read the facts presented to you, I really can't help you any further. Sorry, but there is no cure for willful ignorance...
 

Offline evan_au

  • Neilep Level Member
  • ******
  • Posts: 4130
  • Thanked: 249 times
    • View Profile
Re: What is dark energy?
« Reply #12 on: 22/10/2016 08:14:15 »
Interesting - The Dark Energy Camera: A 750 Megapixel camera designed especially to take pictures of galaxies to obtain hints about dark energy.
http://www.space.com/10607-dark-energy-survey-universe-expansion-aas217.html
 

Offline timey

  • Neilep Level Member
  • ******
  • Posts: 1308
  • Thanked: 8 times
    • View Profile
    • Patreon
Re: What is dark energy?
« Reply #13 on: 22/10/2016 12:21:28 »
Have we heard anything back from these hunters of dark energy yet?

Because the link is dated 2011 and it was a 5 year project.  Maybe they got up and running behind schedule, but we are at end of 2016.  One would have kinda thought that any whiff of a dark energy observation may have filtered into the mainstream physics news by now...
 

Offline acsinuk

  • Sr. Member
  • ****
  • Posts: 236
  • Thanked: 1 times
    • View Profile
    • electricmagnofluxuniverse.blogspot.com
Re: What is dark energy?
« Reply #14 on: 28/10/2016 16:49:18 »
Dark energy could be the name for electrostatic repulsion force between stars which is about 20 times stronger than gravity.  A further magnetic force of 3 times gravity also adds as a dark matter force.  This balances the galaxies as their magnetic spins appears as extra dark matter astronomers are looking for. 
WMAP did confirm we only have a third of matter required and that expansion of universe is impossible unless a negative gravity force of 23 times gravity is present.  The maths is correct if you electrify the universe. Just semantic names?
 

The Naked Scientists Forum

Re: What is dark energy?
« Reply #14 on: 28/10/2016 16:49:18 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums