Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: omid on 19/02/2010 11:03:15

Title: which gas is found in the space?
Post by: omid on 19/02/2010 11:03:15

Any Ideas??????????? [???]

Title: which gas is found in the space?
Post by: peppercorn on 19/02/2010 11:11:28

Quote from: omid on 19/02/2010 11:03:15

Any Ideas??????????? [???]

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

Title: which gas is found in the space?
Post by: omid on 19/02/2010 11:19:00

Quote from: peppercorn on 19/02/2010 11:11:28

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

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

Title: which gas is found in the space?
Post by: syhprum on 19/02/2010 11:58:51

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

Title: which gas is found in the space?
Post by: peppercorn on 19/02/2010 14:12:36

Quote from: syhprum on 19/02/2010 11:58:51

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?    [:D]

Title: which gas is found in the space?
Post by: graham.d on 19/02/2010 14:58:39

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

Title: which gas is found in the space?
Post by: omid on 19/02/2010 17:35:50

Quote from: syhprum on 19/02/2010 11:58:51

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???????????

Title: which gas is found in the space?
Post by: syhprum on 19/02/2010 18:19:51

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."

Title: which gas is found in the space?
Post by: Soul Surfer on 19/02/2010 21:54:36

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.

Title: which gas is found in the space?
Post by: yor_on on 20/02/2010 02:00:57

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

Title: which gas is found in the space?
Post by: Soul Surfer on 20/02/2010 21:21:24

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.

Title: which gas is found in the space?
Post by: yor_on on 23/02/2010 19:53:13

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

Title: which gas is found in the space?
Post by: acsinuk on 28/02/2010 03:24:48

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

Title: which gas is found in the space?
Post by: syhprum on 28/02/2010 14:42:53

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,

Title: which gas is found in the space?
Post by: omid on 28/02/2010 18:40:06

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

Title: which gas is found in the space?
Post by: Bored chemist on 28/02/2010 21:24:13

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.