Should have just added this to the main video...

So I mostly like this extra interviews format but this 47s clip (of actual talking) could _easily_ have been part of the main video. What was the reasoning behind cutting it into its extra part?

@nottinghamscience

7 жыл бұрын

It just did not fit in nicely with the flow of the original in my opinion - it also would have pushed the original past 10 minutes which is quite a psychological barrier for viewers who are less diligent than your good self. :)

@Kram1032

7 жыл бұрын

Fair enough :)

@Kram1032

7 жыл бұрын

Or maybe it's because of what nottinghamscience already answered it is about ;)

@GenGariczek

7 жыл бұрын

Sorry, didn't see the comments when I wrote this for some reason :)

I was under the impression that lines from certain actinides like californium HAD beed detected in supernova spectra but see conflicting statements on it now.

@rogerdotlee

7 жыл бұрын

I don't know that they are conflicting statements. I don't recall them saying that these elements did NOT come into existence during a supernova, just that they have sufficiently short half-lives that by the time the supernova that created the gold in J. Random's Gold Tooth was extracted from the ground (some 4 billion years after the Earth was formed, and some untold million/billion years after the supernova that created said gold), the Californium or Berkelium or other isotopes of unobtanium had decayed into non-existence. Make sense?

"Supernovae are not _that_ energetic." Yeah, well ... :)

Not really extra footage. Is 'inchage' a word?

@xCorvus7x

5 жыл бұрын

It should be. And it is now. Thanks foe the insight.

How do atoms formed from these r and s processes clump together to eventually form nuggets and ore veins on asteroids and planets? Do groups of atoms of gold, for instance, form at the same time and clump together or do they not clump together at all and these processes just form a highly mixed soup of individual atoms of various elements?

@PaulHigginbothamSr

7 жыл бұрын

Of course they are random and don't form veins as a laydown process. They are in a body, that then is continually bombarded with small nuggets, so rapidly the whole thing melts. When molten, you have chemical locations in the larger body that have the same melting point, and diffraction, thus forming local areas with more of the same stuff. Thus iron would be located where chemically lots of iron loving material is located, and other areas were lots of silicon and calcium and aluminum is. But mixed throughly. but before freezing solid, you have thermal mixing motions, that may lift the heavier elements up into the lighter elements in a vein, same down below, with lighter elements into the heavier materials. And early on you have radioactivity, which decays to heat the sample for many years, to make the process last a long time.

@aetherseraph

7 жыл бұрын

gooday I am inclined to suggest that the onion like strata of stars plays a roll, theses elements probably get created in vast swaths of rapid nucleation.

What is to stop us humans creating heavier elements using the r process? That means if we hit Uranium or even heavier elements with neutrons what would happen?

@DanDart

7 жыл бұрын

Hitting uranium with neutrons tends to make it fission (which releases more energy, which is why we use it for power). It's quite difficult in practice without massive temperatures to input excess energy. The best we can do is to smash medium-sized nuclei with other medium-sized nuclei at huge temperatures and hope they stick together without flying apart again, which is ridiculously rare, especially as the bigger elements have shorter half-lives..

it´s a test, right? :D

@DanDart

7 жыл бұрын

You mean recalling elements' names? :p