NASA's Nancy Grace Roman Space Telescope, the next great leap in space-based astronomy, is set to be launched in early September, eight months ahead of schedule and under budget, marking a rare milestone for a flagship science mission. The telescope, named after the "mother of the Hubble Space Telescope," is designed to investigate the invisible forces shaping the universe, dark energy, a force accelerating the expansion of space. Its core mission is to understand the origin of dark energy and its influence on galaxies. The 300-megapixel Wide Field Instrument will allow scientists to measure light from potentially a billion galaxies over its lifetime, a scale that is unprecedented. While Hubble transformed astronomy with deep, narrow views, Roman's field of view is at least 100 times larger. Its unique capabilities include a massive infrared camera that will map galaxies across cosmic time, a cutting-edge system that blocks starlight, allowing direct imaging of exoplanets up to a billion times fainter than their hosts. Roman will operate in tandem with other next-generation observatories to investigate these issues. It may also help scientists determine whether dark energy is a constant property of space, evolving over time, or a sign that our understanding of gravity needs revision.