The Milky Way galaxy is observed to have multiple components with distinct properties, such as the bulge, disk, and halo. Unraveling the assembly history of these populations provides a powerful test to the theory of galaxy formation and evolution, but is often restricted due to difficulties in measuring accurate stellar ages for low mass, hydrogen--burning stars. 1,2 Unlike these progenitors, the "cinders" of stellar evolution, white dwarf stars 3 , are remarkably