NASA's Nancy Grace Roman Space Telescope is designed to answer big questions about the universe. What is dark energy, which seems to be speeding up the expansion of the universe? How many planets exist among the stars, and what are they like? The Roman Space Telescope is similar to Hubble, but benefits from 30 years of technological development. It will view the sky on a scale never before accomplished from space. This is where Roman is closest to Hubble. It has the same size and type of main mirror, a 2.4 meter precisely shaped piece of silver-coated glass. The size of this mirror is partly how Roman matches Hubble's resolution. Roman's main camera is the wide field instrument, which will take infrared pictures of the sky to set a dark energy, observe galaxies and stars, and find exoplanets. Instead of Hubble's single first-generation image sensor, the WFI incorporates 18 third-generation chips that allow it to take pictures, capturing 100 times greater sky area than Hubble's. Each 300 megapixel image will enable scientists to study a large portion of the sky. At Roman's back is its primary means of communication with Earth, the high-gain antenna. This antenna will be responsible for sending nearly 1.4 terabytes of data to ground stations every day. That's the equivalent of 460 hours of streaming video. Roman's critical systems, such as power and data handling, are located in six modules at the spacecraft's rear. These include six rotating reaction wheels that control where the spacecraft points, nearly one ton of propellant for larger movements, and a 10 terabyte data recorder. Roman's other instrument is its coronagraph technology demonstration. A coronagraph blocks a star's light to capture the faint light for morbidating planets. It will be the first time a space telescope has used deformable mirrors to precisely control the incoming light and special masks to block only the star light. This method will enable Roman to capture direct images of distant planets and even analyze the light that is reflected off their surfaces, allowing scientists to learn about their composition and atmospheres. The spacecraft solar panels provide its power by converting sunlight into electricity. They also shade the spacecraft, helping to keep its instruments at their design temperatures. The solar panels will be able to provide 4100 watts of power, enough to run two commercial microwave ovens. With all these systems working together and in partnership with powerful future telescopes, the Nancy Grace Roman Space Telescope will be able to usher in a new era of studying our universe.