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Physics, Astronomy & Cosmology / Why one Swedish professor doesn´t belive in dark energy

« on: 01/09/2011 15:37:55 »

 I heard on the radio a Swedish Professor of astronomy that said that he did not believe in dark energy.

He believed that the photons emitted billions of light years away lost energy while travelling through space, and since light can’t slow down it looses energy by red shifting. Similar to light leaving a heavy object and gets red shifted.

The farther away from us the light was emitted the more energy it will have lost and the more red shifted it would be giving the appearance of an accelerating expansion of the universe.

It seems reasonable to me that a photon when it has travelled billions of light years will have lost some energy thus getting red shifted.

Have you heard this theory before? Any thoughts on this?   

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Physics, Astronomy & Cosmology / What's happening at the LHC?

« on: 05/04/2011 03:30:02 »

Magnus Westberg  asked the Naked Scientists:
   
Hello Chris and the naked scientists
 
thank you for a great podcast i´ve listened to all your episodes,
 
My Question:
 
How´s it going at the large hadron collider? I hear a lot about what the want to do and find, but have they actually made any scientific discoverys since they started?
 
Magnus Westberg listening in Sweden        

What do you think?

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New Theories / Dark energy theory

« on: 11/02/2011 15:17:11 »

Dark energy theory

Hello guys,

I don’t know if anyone have thought of this before or if it's a ridiculous idea, but here is an outside the box theory  []

We think of dark energy as a force that accelerates the expansion of the universe. As a property of space that constantly pushes the universe outward in to the nothingness beyond it.

Is it possible that it is actually “free faling” in to this nothingness. So rather than being pushed from the inside and out, the universe Is being pulled outward in to the nothingness outside our universe

I think this would be consistent of what we “know” about dark energy that it has been acting like a cosmological constant for a very long time and have not been diluted as the universe has expanded because the dark energy is is not actually inside our universe.

If the universe is constantly being pulled out in to the nothingness, “free falling in to it” In the beginning it would have been held back by the matter density (gravity) and as the matter density decreases it would accelerate faster like we also observe.

So dark energy is not a force pushing the universe outward from the inside.
It is something pulling it outward from the outside.

 The universe is expanding and it must be expanding into something, what if this something is actually pulling it outward and we interpret this as dark energy.

I´d love to hear what you think