What is the life and death of Sirius the star?

Answer 1

Sirius's fate might be peaceful; just ejecting it's outer red giant layers to make a planetary nebula. It is 2.02 times the mass of the Sun. However, Sirius has a white dwarf companion. On Sirius B's death, Sirius A might have formed. At the other end, Sirius B might destroy Sirius A. White dwarfs have very strong gravity, and if it is close enough, Sirius B might steal material from Sirius A. When a white dwarf stealing mass from the parent star has enough mass to create iron, the iron triggers a Type 1a supernova. If this happens to Sirius B, Sirius A could either be destroyed by the immense force of the explosion, or become a runaway star, travelling faster than even Barnard's Star. If this is the case, Sirius A might eat smaller stars or crash and burn into a larger star. If it heads towards us if this happens, we would be doomed.

Answer 2

Sirius is a binary star system, consisting of the main-sequence star Sirius A and the white dwarf companion Sirius B. Over time, Sirius A will evolve into a red giant and eventually shed its outer layers, while Sirius B will cool down and fade away. This process will take millions of years, after which both stars will cease to exist in their current forms.