The billion progenitor stars that lived and died before the sun was born wept in their remnants, scattered their grief across the interstellar medium, and waited. Four and a half billion years, they waited for her. THE BILLION PROGENITORS COATLICUE — 30 SOLAR MASSES the mother of the sun 4.568 BILLION YEARS AGO TRIGGERED COLLAPSE shockwave compresses molecular cloud HUNDREDS OF STARS ARE BORN GALACTIC POTENTIAL integrateOrbitBackward() function calculateGalacticPotential() { const bar = getBarPotential(t); const arms = getSpiralArmDensity(r, θ); return integrate(star, dt); } COATLICUE'S CHILDREN SOL HD 162826 — 110 LIGHT-YEARS — HERCULES first confirmed solar sibling · 2014 PRESOLAR GRAINS silicon carbide · nanodiamond · graphite messages from dead stars, falling through her hair 36 DAYS LEFT she kept working we are not alone in the galaxy we have family