Monday

White dwarfs are the remnants of stars born with less than ~10Msun, and hence represent the final destination of all known planetary systems. Many white dwarfs reside in binaries, some of which on evolutionary pathways towards thermonuclear supernovae. Using white dwarfs as probes across a wide range of astrophysical requires access to high-resolution space ultraviolet spectroscopy. I will provide a brief overview of the progress resulting from nearly a decade of HST/COS observations, and will then discuss the enormous opportunities that a next-generature large-aperture ultraviolet mission will have in combination with Gaia and massive ground-based spectroscopic surveys.