jcely7
member
Reged: 10/21/07
Posts: 66
Loc: Minnesota
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Just saw this, hope you get a kick out of it! 
Astronomer's Periodic Table
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Z10 dob on a 70's Star-liner GEM.
Orion 102 mak on Bogen 3063.
Konus 20x80
Zhumell eyepiece and filter kit
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Kris Smet
Pooh-Bah
Reged: 09/16/04
Posts: 1097
Loc: Belgium
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i actually have wondered about the distribution of hydrogen & helium in the universe. if i'm correct nearly all, if not all, the universe's H & He were formed during the first moments of the big bang. this H & He has since then been used in stars for billion of years and fused into heavier elements, up to iron in stars, and higher elements during supernova's.
if that's so, can the universe run deplete of Hydrogen, i haven't read anything about Hydrogen being formed anywhere in some processes  or is there simply such a huge amount of Hydrogen available that the universe will probably come to an end (whatever it might be) before we run out of hydrogen?
perhaps a stupid question, but i can't remember reading anything about this anywhere...
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Kris
To be old & wise, you first gotta be young & stupid 
8" dob
AstroTech 66ED/APO
TAL 120 newt.
my CN sketch & picture gallery
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ericjacob613
Photon Hog
Reged: 05/25/07
Posts: 3078
Loc: Santa Barbara CA
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Kris, I read a book called "The Five Ages of the Universe" where they describe their idea of the end of the universe. It continues on after running out of hydrogen.
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llanitedave
Humble Megalomaniac
Reged: 09/26/05
Posts: 10477
Loc: Amargosa Valley, NV, USA
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I assume that means just running out of useable hydrogen. I believe there will always be far more hydrogen than any other element -- it's consumption in stars is very inefficient.
When a nebular cloud collapses to form a star, most of the mass of the cloud is blown away by the winds of the proto-star. When a solar-mass star becomes a white dwarf, only the core remains, most of the atmosphere, which is largely hydrogen, dissipates in the planetary nebula. When a star explodes as a Type II supernovae, unless it is a Wolf-Rayet star which has already lost its hydrogen envelope, the outer atmosphere of the exploding star remains mostly hydrogen.
I don't know how to get the numbers, but I'd bet dollars to donuts that for every hydrogen atom that is fused to make another element, many other hydrogen atoms dissipate into space, never to be incorporated into any body.
If I'm wrong, I hope someone will correct me. I haven't had a good donut in a while!
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"S.O.E." (Sauron's Other Eye) 16" Royce conical mirror: A permanent work in progress.
10" Homebuilt dob, old Coulter mirror
Next Project: The "Eye of Sauron" Observatory!
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Mister T
sage
Reged: 02/01/08
Posts: 201
Loc: Upstate NY
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Is dark matter on that chart???
and I just can't see it???
or is it because that chart is lacking about 9 dimensions??
Brian Greene gives me a headache...
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Tony
"After the Laws of Physics, everything else is opinion"
-Neil deGrasse Tyson
Oberwerk 11x70 Binoc
old camera tripod
mags and books
Meade 60mm refractor
Elmira-Corning Astronomical Society,
http://www.corning-cc.edu/visitors/observatory
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jcely7
member
Reged: 10/21/07
Posts: 66
Loc: Minnesota
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lol, the dark matter is what holds the chart together!!! 
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Z10 dob on a 70's Star-liner GEM.
Orion 102 mak on Bogen 3063.
Konus 20x80
Zhumell eyepiece and filter kit
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Mike K
sage
Reged: 04/01/07
Posts: 464
Loc: Central Texas
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Don't forget dark energy, which keeps it from collapsing in on itself!
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Clear skies,
Mike K.
30°31" N 97°44" W, LP: Red
Observe: Once or twice a week back yard, once a month under dark skies
Favorites: Globulars, planets, face-on spirals
Equipment: CPC925/XT10i/TMB-92SS/Lunt LS60THaDS
Eyepieces: Naglers, Ethoi, UO HDs, Hyperion Zoom
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TomC10
sage
Reged: 12/21/04
Posts: 239
Loc: Land of Enchantment
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Kris that's a good question. From a quick search the estimates I've found are ~75%/25% H/He by mass, or 92%/8% H/He by number (with a little Lithium, etc...) after the big bang.
Stellar fusion is creating more Helium in the universe all the time, but going the other way toward Hydrogen...? it would take the same amount of energy to split He into H that stars get from making He out of H. Perhaps in the huge jets of energy roaring out of quasars, from feeding black holes..., matter might be ripped apart into protons, etc? allowing Hydrogen to reform from the pieces? However a supernova kicks out a lot of energy and tends to create even heavier elements...
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Tom C
C10 NGT
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groz
professor emeritus
Reged: 03/14/07
Posts: 541
Loc: Duncan, BC
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Quote:
but I'd bet dollars to donuts that for
...
If I'm wrong, I hope someone will correct me. I haven't had a good donut in a while!
Dollars to donuts used to be a good long odds bet. today, it's a sucker bet. A good donut costs a dollar or more.
If you find somebody today who will actually take the 'dollars to donuts' bet, what you have done, is put another data point into the massive data set showing us, joe/jane average cannot even do simple arithmetic today.
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star drop
Guilty as Charged
Reged: 02/02/08
Posts: 3247
Loc: Cattaraugus Co., NY
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The table is missing the most abundant substance in the Earth's atmosphere. Cy - Cloudyium
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Ted
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Achernar
Post Laureate
Reged: 02/25/06
Posts: 3721
Loc: Alabama, USA
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Is Unobtainium on the Astronomer's Periodic Table? 
Taras
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10-inch F/4.5 Discovery Dob
6-inch F/8 Homebuilt Dob
4 1/4-inch F/4 Homebuilt reflector
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Kris Smet
Pooh-Bah
Reged: 09/16/04
Posts: 1097
Loc: Belgium
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I can't see Coronium on the list either...
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Kris
To be old & wise, you first gotta be young & stupid
8" dob
AstroTech 66ED/APO
TAL 120 newt.
my CN sketch & picture gallery
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