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Supernova nucleosynthesis is the production of new chemical elements inside supernovae. It occurs primarily due to explosive nucleosynthesis during explosive oxygen burning and silicon burning.[1]
Those fusion reactions create the elements silicon, sulfur, chlorine, argon, sodium, potassium, calcium, scandium, titanium and iron peak elements: vanadium, chromium, manganese, iron, cobalt, and nickel.
As a result of their ejection from supernovae, their abundances increase within the interstellar medium. Elements heavier than nickel are created primarily by a rapid capture of neutrons in a process called the R-process.
However, there are other processes thought to be responsible for some of the nucleosynthesis of heavy elements, notably a proton capture process known as the Rp-process and a photodisintegration process known as the gamma (or p) process. The latter synthesizes the lightest, most neutron-poor, isotopes of the heavy elements.
I just don't know why all the planets look different from one another. Why should they?
Tell me that there's a sound reason for the differences, and then explain them.
Originally posted by VoidHawk
Where did they get their atmospheres from?
Originally posted by nerbot
Originally posted by VoidHawk
Where did they get their atmospheres from?
"Atmospheres 'r Us"
Second star on the left and straight on til morning.
I'm glad all our planets (all planets) are different. Be real boring deciding which one to shoot rockets at next.....eenie-meenie-mynie-mo...edit on 3/7/2013 by nerbot because: (no reason given)
Originally posted by jiggerj
Originally posted by Idonthaveabeard
All a bit nut jobby for me.
Oh, I admit my mind has been screaming those same sentiments, but I can't get past the why of it? Why aren't there two planets that look alike? Three? Five? Why aren't they all made of the same stuff (all rock, all iron, all ice)?
Tell me that there's a sound reason for the differences, and then explain them.
why not pick up a book or find a YouTube vid with the info to get you started and then you cross check info and get verification or at least verification from multiple sources saying the same thing. What your asking for is widely available. I see Boncho has stood up to the plate and hit a home run
Originally posted by libertytoall
Why isn't an electron a proton? They're just different..
When you explain it like that it doesn't really make sense. I don't think the video boncho posted explained it too well either, though as it said some parts of the process aren't well understood. But I can certainly explain it better than that.
Originally posted by jiggerj
As far as I know the story of the creation of our solar system is that it was a huge dust cloud from some explosion. So, we have a dust cloud where most of the hydrogen had collected over there to create a planet, and most of the iron went over there to create a planet? Does that sound right to you?
Originally posted by Arbitrageur
When you explain it like that it doesn't really make sense. I don't think the video boncho posted explained it too well either, though as it said some parts of the process aren't well understood. But I can certainly explain it better than that.
Originally posted by jiggerj
As far as I know the story of the creation of our solar system is that it was a huge dust cloud from some explosion. So, we have a dust cloud where most of the hydrogen had collected over there to create a planet, and most of the iron went over there to create a planet? Does that sound right to you?
When the dust cloud formed, a proto-star formed in the center. The dust and gas around the star contained all kinds of materials. But what happened closer to the stars heat is that all the less dense stuff was burned away by the star. It's not that the denser stuff migrated there in particular, that's all that was left, kind of the charred remains of a broader range of materials if you will. And yes that model makes perfect sense to me, much more than your description which isn't really what happened.edit on 3-7-2013 by Arbitrageur because: clarification
Originally posted by OccamsRazor04
reply to post by jiggerj
They are different because their composition is different. Uranus and Neptune are very similar and look very similar.edit on 4-7-2013 by OccamsRazor04 because: (no reason given)
Originally posted by tooo many pills
reply to post by jiggerj
Not all of those are planets bro!