NASA's Roman Telescope Could Unravel the Mysteries of Dark Energy and Dark Matter

The Nancy Grace Roman Space Telescope, named after the pioneering astronomer, is set to launch and explore the mysteries of dark matter and dark energy. Although invisible, dark matter is believed to make up about 27 percent of the universe's mass and plays a crucial role in holding galaxies together through its gravitational pull. On the other hand, dark energy, which makes up about 68 percent of the universe, is thought to be the force that drives the expansion of the cosmos.

Roman's primary objective is to study these elusive components and their impact on the universe’s structure. The telescope will provide high-resolution images of the sky, enabling scientists to analyze gravitational lensing. This phenomenon occurs when massive objects, like black holes or galaxy clusters, bend the light from distant sources, effectively acting as natural telescopes. By studying this effect, researchers can better understand dark matter’s influence on cosmic objects.

Roman’s wide-field infrared survey instrument will capture images of vast sections of the sky, allowing astronomers to investigate the distribution of matter and the growth of structures over time. By tracking how these structures evolve, scientists can gain insights into the nature of dark energy. Moreover, the telescope’s ability to gather light and spectra from approximately 20 million galaxies will help determine the expansion rate of the universe at different cosmic epochs, providing crucial data for mapping the cosmos in unprecedented detail.