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RE: The story of how our sun will become a massive diamond floating in the sky.
in heat transfer the sun change with all the universe with Radiation so how can the radiation turn to convection ? because in the space there's nothing !!
You are right, the heat transfer from a star like our sun to its environment can only be done by radiation. For convection based heat transfer you need a material medium. Space being mostly exempt of matter, convection processes cannot occur in space.
This is why a white dwarf takes so long to cool (radiation based cooling is not very effective for very dense objects with a small surface like white dwarfs)
However, within the plasma of a star, i.e, inside the outer layers of a star, convection currents do exist, but they just channel thermal energy within the star itself (from hot spots to cold spots for example).
thank you a lot .. so rich informations sir (y)