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amer7909
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Join Date: Aug 2008
Posts: 16

Is Space Empty?

02/04/2010 2:32 AM

Dears

I have enquiry about space, is the space empty or it not empty ?

I'm asking about the space between moons and stars.

Thanks.
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PWSlack
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#1

Re: what is in the space ?

02/04/2010 2:55 AM

It is not empty in terms of there being a number of atoms per cubic metre.

It is not empty in terms of the radiation passing through it.

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Hendrik
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#2

Re: what is in the space ?

02/04/2010 4:33 AM

Not so long ago scientist believe it was filled with a calcium cloud.

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Steve S.
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#3

Re: what is in the space ?

02/04/2010 6:56 AM

It is pretty darn close to empty, but not empty. Lots of dust, gas, radiation, photons...
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Anonymous Poster
#4

Re: what is in the space ?

02/04/2010 11:31 AM

Where is the DarthVader Dark matter ? Photons shooting about ?
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redfred
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#5

Re: Is Space Empty?

02/12/2010 10:49 AM

Nowhere is there a perfect vacuum. Like absolute zero, this is a theoretical physical condition that cannot be actually achieved. Now interplanetary space has been directly measured to be much closer to a perfect vacuum than any vacuum made here on earth. Interstellar space has been indirectly measured to have regions even closer a perfect vacuum than interplanetary space. Naturally there's a multitude of "massless" particles flying through these regions, particles like photons and neutrinos. But there's also the weird quantum mechanic phenomena of virtual particles that spontaneously appear and disappear.

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