Thread: Is the universe an open or a closed system?

I guess that because there is nothing beyond the universe, it is a closed system, but that would be contrary to laws of thermodynamics...can someone explain this to me in a simple language?

Urod, please.

(Sorry Dkav I don't know, but I am curious)

How is the fact that the universe, by definition everything there is, and therfore a closed system, incompatible with thermodynamic laws ??

Urod-isms moved to pseudoscience.

Originally Posted by Dkav

I guess that because there is nothing beyond the universe, it is a closed system, but that would be contrary to laws of thermodynamics...can someone explain this to me in a simple language?

1. It depends on your definitions. There is nothing "beyond" the universe, because the universe includes everything, including what is beyond. So for all intents and purposes, the universe is infinite. In practice, we can choose any system to be closed (ie. stick a box around it), which may give different results if the experiment is open.
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2. The laws of physics are not immutable, and are sometimes just guidelines. See for example, "Second law of thermodynamics "broken".

It is a closed 'adabiatic' system.

the general consensus is that the universe is an open system that will eventually end in heat death.

Light travels at 3100miles/s. The universe expands at 48 miles/s. For space not to be gaining heat and pressure that light must be being absorbed.

I speculate that what we understand of the universe is melted space and that it is surrounded by solid space the melting of which allows for expansion.

This is wrong and ignorant of accepted science M T T ( moderators ??? ) .

STOP IT !!

Check out the word firmament.
But considering that came from religion just explain where the energy goes.

this video claims to have the answer to your original question (open universe this would claim)

'A Universe From Nothing' by Lawrence Krauss, AAI 2009 - YouTube