From the medium a protostar coalesces, driven by gravity. In its environmental assemblages, albeit extended in time, pressure builds at its core, eventual is a hydrogen furnace, then balanced competition between that gravitational pressure and its outward radiation, thus are the majority of stars.

For an eternity, that assemblage of substance is the fuel that fuses into time, or age, for life as a star is ephemeral on a universal scale that our minds struggle feebly to digest.

For billions of years, she burns, gathering and expending mass, burning hotter, eventual is helium, carbon, oxygen, sodium, neon, magnesium, silicon, sulfur, phosphorous, and silicon, then in a finale: a core of iron and nickel.

For the magnificent, that core bouncing to a colossal giant and then to a cooling dwarf, or into a super-colossal nova as an explosive reseeding of its progenitor, permeating waves which jitter the interstellar medium and inseminating its progeny.