The Wide Field Infrared Survey Telescope (WFIRST) is a NASA space telescope that will conduct a wide-field survey of the infrared sky to study dark energy, exoplanets, and infrared astrophysics. WFIRST aims to address key questions in astrophysics, such as the nature of dark energy and dark matter, the formation and evolution of galaxies, and the prevalence and characteristics of exoplanets. It will have a large field of view and advanced imaging capabilities, making it a powerful tool for studying a wide range of astronomical phenomena.