[LibWhacker]

Thanks. I do find the entire notion very interesting -- and very bizarre . . . A supernova collapsing back on itself and burning once again -- at least by all outward appearances -- as a normal star would. And to be in a stable state long enough for intelligent life to evolve on one of its inner planets, all maintained for the most part by the residual heat of the neutron star at its core. Can't say that isn't fascinating!

[Justa]

If it did supernova then where'd all its hydrogen come from?

[PatrickHenry]

A supernova collapsing back on itself and burning once again -- at least by all outward appearances -- as a normal star would. And to be in a stable state long enough for intelligent life to evolve on one of its inner planets, all maintained for the most part by the residual heat of the neutron star at its core.

That seems to summarize it. It's not the ordinary stellar history. And at what part of the sun is fusion happening? Presumably not in the iron core. If it's what we assume, hydrogen-into-helium fusion, how did all that hydrogen survive the supernova explosion and remain behind to ignite the burned-out remains of the nova?