In recognition of her pioneering, sustained work in using light-element abundances to test Big Bang nucleosynthesis and to probe stellar structure and stellar evolution.

For her leadership in studies of magnetohydrodynamic turbulence on all scales and in diverse astrophysical environments, using innovative techniques to carefully compare observational data with numerical simulations.

For his transformational work on the star-formation histories of dwarf galaxies in the Local Group.

For their scholarly book Supernova Explosions (Springer, 2017), an extraordinary compilation of information that is logically organized, benefits from clear and engaging writing, and features terrific insights of the kind you'd hope for from a mentor.

For his pioneering work in astrochemistry and innovative contributions to our understanding of the physics and chemistry of star and planet formation, and for his tireless efforts to improve diversity and inclusion in astronomy.

For her leadership of the XENON project and its groundbreaking search for the particle that is thought to make up the dark matter in the halo of the Milky Way Galaxy.

For his innovative leadership in detecting and modeling exoplanets and their formation, protostellar disks, the interstellar visitor ‘Oumuamua, and the distant future of the universe.

For their scholarly book Supernova Explosions (Springer, 2017), an extraordinary compilation of information that is logically organized, benefits from clear and engaging writing, and features terrific insights of the kind you'd hope for from a mentor.

For his contributions to our understanding of the structure and dynamics of the Milky Way and his work on forward modeling of large scientific data sets.

For his pioneering work in high-angular-resolution studies with long-baseline optical interferometry, which have moved the field from measurements in visibility space to true imaging and opened up a new window on stellar astrophysics.

Chile plays a huge role in US astronomy, and Hamuy has made fundamental contributions to cosmology and supernova research. He is currently the president of CONICYT (the Chilean science funding agency).