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Author Topic: Why is meant by the expansion of the Universe?  (Read 1295 times)

Offline thedoc

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Why is meant by the expansion of the Universe?
« on: 14/08/2012 09:30:01 »
Muhammad Al-Hakeem  asked the Naked Scientists:
   
What does the expansion of the universe mean? Is it the normal motion of galaxies or the stretching of the edge of the universe?

Highly appreciate your work.

Muhammad Al-Hakeem.

What do you think?
« Last Edit: 14/08/2012 09:30:01 by _system »


 

Offline Soul Surfer

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Re: Why is meant by the expansion of the Universe?
« Reply #1 on: 16/08/2012 11:32:02 »
It is the expansion of the actual space between the galaxies.  Its a bit like someone was creating a bit more space all the time and spreading it around.
 

Offline @/antic

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Re: Why is meant by the expansion of the Universe?
« Reply #2 on: 16/08/2012 20:04:00 »
So, why is this expansion only between the galaxies and not within the galaxies also?

And is new space/time being constantly unfurled?
 

Offline imatfaal

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Re: Why is meant by the expansion of the Universe?
« Reply #3 on: 17/08/2012 13:34:36 »
So, why is this expansion only between the galaxies and not within the galaxies also?

And is new space/time being constantly unfurled?

Gravity is stronger than the expansion - so galaxies, and clusters which are bound to gether by gravity will stay bound.  the empty spaces with no forces grow.  And yes it is new space in all the gaps. 
 

Offline imatfaal

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Re: Why is meant by the expansion of the Universe?
« Reply #4 on: 17/08/2012 13:36:03 »
mod note

EMC2 - I split your post regarding the big bang into a new thread. 
 

Offline Emc2

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Re: Why is meant by the expansion of the Universe?
« Reply #5 on: 18/08/2012 07:50:13 »
ok, cool

  lol just have to find it
 

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Re: Why is meant by the expansion of the Universe?
« Reply #5 on: 18/08/2012 07:50:13 »

 

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