to determine brown dwarf ages from white dwarf ages using wide binary systems

to identify nearby accelerating stars and create a target list for follow-up discovery and characterization of as-yet unseen companions

to develop technology and techniques that will advance the state-of-the-art in direct exoplanet imaging

for the upgrade and refurbishment of the 90Prime optical imager on the Bok 90-inch telescope

to support the second development phase of MagAOX

to test theories of binary star formation and tidal evolution

for the 51 Pegasi b Fellowship

for the 51 Pegasi b Fellowship

for the development of Skipper technology

to investigate how volcanic rocks contribute to chemical evolution in a prebiotic environment

for the research and related work of Antranik Sefilian in connection with the 51 Pegasi b Fellowship program

for the Nautilus Space Observatory

for the development of the science case for the Nautilus Observatory

for examining whether M-Earths can sustain surface liquid water via alternative reservoirs

for the research and related work of Luis Welbanks in connection with the 51 Pegasi b Fellowship program

for the research and related work of Megan Weiner Mansfield in connection with the 51 Pegasi b Fellowship program

to determine brown dwarf ages from white dwarf ages using wide binary systems

to accelerate the development and scale-up of the ANTARES community broker to effectively operate on the ZTF public alert stream

for purchase of an emergency backup generator and related equipment

to support the design and build of the Local Volume Mapper instrument for SDSS-V

for the simulation and detection of potential biosignatures

for a program-related investment (PRI) for the Dark Energy Spectroscopic Instrument (DESI)

for the design of a segmented 6-meter primary mirror

for research into the mechanisms that maintain planetary hydrologic cycles

for the development and fabrication of a laser frequency comb for the W. M. Keck Observatory

for Program Related Investment

to support the construction and installation of the Keck Cosmic Web Imager (KCWI) blue channel instrument on the Keck II telescope on Mauna Kea

to support the upgrade of W.M. Keck Observatory’s near-infrared spectrometer (NIRSPEC)

to support the preliminary design of the Keck Planet Finder (KPF) and the purchase of long lead time items critical to the timely completion of this instrument

to support the continued development and engineering of the Keck Planet Finder

for a Program Related Investment for the Keck Planet Finder Instrument project

for the Keck Planet Finder Solar Calibrator

to support development of the SCALES instrument

to investigate spectroscopic signatures of planet formation

for upgrades and engineering interventions for the Keck Planet Finder (KPF)

for integrating a helium filter onto the wide field infrared camera (WIRC) on the Hale Telescope

to research surface processes on icy ocean worlds

for the development of orbitize!, a comprehensive orbit-fitting software package for the high-contrast imaging community

for the 51 Pegasi b Fellowship

for the 51 Pegasi b Fellowship

for the development and fabrication of the Next Generation Palomar Spectrograph

for the 51 Pegasi b Fellowship

the development and fabrication of the SEDMv2 instrument

for the 51 Pegasi b Fellowship

to support theory development at the interface of cosmology and quantum mechanics to identify observational signatures that can distinguish competing models of how the universe was formed and evolved

to design and build the fiber injection module for W.M. Keck Observatory’s near-infrared spectrograph

for the 51 Pegasi b Fellowship

for the design and construction of the Gattini-IR wide-field infrared imager

to support a graduate student to run models, analyze data, and bridge the theory and observational research of white dwarf stars and type 1ax supernovae

for the design and development of a high-performance, high-contrast coronagraph module for the Keck Planet Imager and Characterizer System (KPIC)