So many things have changed since 2005 - so while theorists are stuck in a conceptual rut, imaging range and power has increased, transmission of observations is easier and so many other things to move the narrative along.

https://upload.wikimedia.org/wikiped...to_explode.jpg

In terms of stellar evolution, the rings present efficiency in stellar processes including those supernovae which go on to create solar system structure after a transition phases.

The key was surmounting a physical impossibility of infinite density/zero volume attributed by theorists to stellar evolution insofar as the term equates to zero density/infinite volume or effectively a long-winded way to describe 'nothing/0'. It is like asking which longitude the North or South Pole exists in - whether all of them or none of them.

The tug of war between density and volume in a progenitor supernova star is exceptionally relevant and by using a specific geometry allied to efficiency seen throughout nature, it became possible to put the narrative together with the geometry back in 1990, at least as a work in progress.