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New evidence of supernova shock wave as origin of our solar system

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radioactive isotopes from a supernova shock wave/Alan Boss

From ScienceDaily:

Because all the iron-60 from the Solar System’s formation has long since decayed, Telus’ research, published in Geochimica et Cosmochimica Acta, focused on its daughter product, nickel-60. The amount of nickel-60 found in meteorite samples — particularly in comparison to the amount of stable, “ordinary” iron-56 — can indicate how much iron-60 was present when the larger parent body from which the meteorite broke off was formed. There are not many options for how an excess of iron-60 — which later decayed into nickel-60 — could have gotten into a primitive Solar System object in the first place — one of them being a supernova.

While her research did not find a “smoking gun,” definitively proving that the radioactive isotopes were injected by a shock wave, Telus did show that the amount of Fe-60 present in the early Solar System is consistent with a supernova origin.

Taking this latest meteorite research into account, Boss revisited his earlier models of shock wave-triggered cloud collapse, extending his computational models beyond the initial collapse and into the intermediate stages of star formation, when the Sun was first being created, an important next step in tying together Solar System origin modeling and meteorite sample analysis.

“My findings indicate that a supernova shock wave is still the most-plausible origin story for explaining the short lived radioactive isotopes in our Solar System,” Boss said. Paper. (public access) – Alan P. Boss. Triggering Collapse of the Presolar Dense Cloud Core and Injecting Short-Lived Radioisotopes with a Shock Wave. V. Nonisothermal Collapse Regime. Astrophysical Journal, 2017 More.

But see also: Textbook theory of moon’s origin is challenged. Science is fun and rewarding as long as theories are only as good as the evidence that supports them.

See also: Post-modern physics: String theory gets over the need for evidence

and

Cosmic inflation theory loses hangups about the scientific methodWhat if naturalism changes the role of a science program? Perhaps stubbornly contrary evidence merely shows the need for more drive and zeal in generating new naturalist theories, not more reflection and evaluation of that direction.

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