Location: Mumbai, Maharashtra
Clever, delightfully so; but sorry, it's hydrogen that makes most stars shine (and it can lift you into the sky more efficiently than helium can, albeit less safely). And even the stars that are shining right now because of helium, previously shone much longer (and will overall release more total energy) on hydrogen than they ever will from helium.
About a quarter of the universe's "normal" matter is helium, and was formed in the big bang, but as for that made in stars:
Helium is the ash of nuclear fusion of hydrogen. A sufficiently large star can "burn" helium when it runs out of hydrogen in its core, but they need to burn a lot more of it per second than a hydrogen burner does to maintain the same luminosity. The helium->carbon process releases a lot less energy than the hydrogen->helium one does. Add to this the fact that the star will in fact be shining brighter than it did before (since it will have swelled to a red giant just to get the core hot enough to "burn" the ash), and it turns out the helium "burning" phase is much, much shorter than the hydrogen "burning" phase.
That having been said, the helium in your party balloon, MRI magnets, etc. was not formed in a star! Any helium that came with the earth at its formation from blown-apart star guts is long gone, having escaped the atmosphere (helium atoms at normal temperatures are moving at greater than escape velocity; once they randomly make to high altitude where they won't just ricochet off other atoms and molecules in the atmosphere, nothing stops them leaving). The helium we have here on earth is old alpha particle radiation from decaying thorium or uranium, trapped in the rocks deep underground, and combining with a couple of electrons (which will be floating around because the lead, polonium, radon, radium or thorium decay products from the radiation won't need them any more). Every uranium atom, as it decays to lead, creates five atoms of helium; thorium creates four. Eventually the helium pools underground, especially in the Texas panhandle area up into Kansas, and voila! helium gas, coming out of the ground. This was a surprise discovery because up until then it had only been observed in stars.
I actually find the thought of earthly helium being cooled-down radiation to be pretty neat in itself.
I'm number one!
I got one less proton,
Than fat helium…
We’re both really light,
We both float in air,
But I’m real combustible,
Like poppa's arm hair!
I am the most!
In our whole universe,
Just let me boast…
Don’t give me more protons,
I like my lightweight,
Atomic number is 1!
And 1's really great!
I sit in first place!
I’m not really stable,
But that’s no disgrace…
I am the first,
And 1’s really fine!
I’ll be number one,
Until the day I combine!
Join Think Atheist
Welcome toThink Atheist
Get Started Nowor Sign In
Or sign in with:
Started by JadeBlackOlive in Small Talk. Last reply by TJ 11 hours ago.
Started by Wassabi in Society. Last reply by TJ yesterday.
Started by JadeBlackOlive in Small Talk. Last reply by TJ yesterday.
Started by Israel Dryer in Advice. Last reply by Noel yesterday.
Started by fruyian in Ethics & Morals. Last reply by TJ on Saturday.
Sunday School September 25th 2016
Sunday School September 18th 2016
Sunday School September 11th 2016
Posted by Noon Alif on September 26, 2016 at 6:00am
Posted by Brad Snowder on September 25, 2016 at 11:27am
Computer Help Forums
© 2016 Created by umar.
Report an Issue |
Terms of Service
Please check your browser settings or contact your system administrator.