[omid (OP)]

Any Ideas?? []

[peppercorn]

Any Ideas?? []

"the space"? - what space?
Outer space will have massively more hydrogen than anything else.

[omid (OP)]

"the space"? - what space?
Outer space will have massively more hydrogen than anything else.

 [ Invalid Attachment ]



Not the planets but the black space [] [] []

[syhprum]

Massive is a rather inappropriate term as inter galactic space contains about 1 atom per cubic meter.

[peppercorn]

Massive is a rather inappropriate term as inter galactic space contains about 1 atom per cubic meter.

not when comes to the ratios of interstellar gases. helium is the next most common, but I couldn't say how much less w.r.t. hydrogen (NB. expressed as a ratio).
I would like to know does hydrogen exist in deep space as single atoms, being as the last time it was close to all the other hydrogen the conditions would have been too violent for bonding to H2... mmmm


BTW nice bit of space there Omid - when's that being delivered then?    []

[graham.d]

Syphrum, I don't think intergalactic space has that sort of density. That is the approximate figure for what you get within a galaxy.

[omid (OP)]

Massive is a rather inappropriate term as inter galactic space contains about 1 atom per cubic meter.

what omid wana know is that atoms of which elements??

[syhprum]

A Quote from this weeks NEW SCIENTIST in relation to the problem of travelling at 'Warp speed'


"Interstellar space is an empty place. For every cubic centimetre, there are fewer than two hydrogen atoms, on average, compared with 30 billion billion atoms of air here on Earth."

[Soul Surfer]

There is a lot of single hydrogen atoms in space an even between the galaxies.  This can be detected by its 21cm hyperfine spectrum line radiation and absorption from the CMB and is very important for understanding the overall structure of the universe and individual galaxies.

[yor_on]

And, my friends?
Exactly why is it hydrogen we find there?

[Soul Surfer]

firstly it is the most common element in the universe.  the very earliest stars show the proportions of hydrogen to helium in the early universe.  All other elements (other than possibly deuterium) are mere traces.

Secondly it is detectable.  helium is not detectable using this technique.

[yor_on]

There are also some helium, trace amounts of lithium and beryllium.

"Very small amounts of these elements formed out of the primordial plasma, which gave rise to mostly hydrogen, some amount of helium, trace amounts of lithium and beryllium and essentially none of anything else. Most of the lithium and beryllium in existence now, as well as practically all the heavier elements, were formed as a result of fusion processes going on in the cores of giant stars and in the supernova explosions those stars create when they die. Small stars like the Sun only fuse hydrogen to helium during their main sequence lifetimes, but eventually fuse helium into carbon when they die, although almost all of this carbon stays in the white dwarf stellar remnant and is not blown out into space. Larger stars fuse successively higher elements one after the other as they age and their cores become denser, and eventually have several layers in their cores where different kinds of fusion are occurring. Finally the central part of the core has enough energy to fuse iron, which results in a collapse into a neutron star, while the outer part of the star is blown away into space, creating a giant cloud of dust with many elements that we are used to. Pretty much every atom we have on Earth heavier than helium is the result of fusion in massive stars that existed earlier in the Universe's history."


Take a look here.
http://www.spaceref.com/news/viewnews.html?id=813

[acsinuk]

DD
This is much higher than the 1 molecule per cubic metre mentioned earlier.
CliveS

[syhprum]

http://adsabs.harvard.edu/abs/1968PASJ...20..230T

This paper quotes a figure of 40 atoms per cubic meter for inter gallactic space, there does not seem to be a very good consensus figure.
We must of course draw a distinction between inter stellar and inter gallactic space,

[omid (OP)]

so is it the hydrogen that gives the space the balck color?? []

[Bored chemist]

Not exactly.
Black is the lack of light. Mostly space is dark because thee's nothing there to light up and nothing to light it up.