Credit: Nicole Drakos, Bruno Villasenor, Brant Robertson, Ryan Hausen, Mark Dickinson, Henry Ferguson, Steven Furlanetto, Jenny Greene, Piero Madau, Alice Shapley, Daniel Stark, Risa WechslerĪ team of astrophysicists has created a simulated image that shows how the Nancy Grace Roman Space Telescope could conduct a mega-exposure similar to but far larger than Hubble's celebrated Ultra Deep Field Image. The large area Roman will observe will also show differences in galaxy properties based on their surrounding environment, allowing astronomers to better understand how early galaxies formed. The mission’s wide field of view will provide an incredible amount of data, helping astronomers find rare objects in the epoch of reionization. Such distant galaxies are extremely faint, so Roman would have to stare at one spot in space for several days to collect enough light from them. Roman could peer across more than 13 billion years of cosmic history, reaching back to when the universe was only about half a billion years old. The image, which contains more than 10 million galaxies, was constructed from a simulation that produced a realistic distribution of the galaxies in the universe. The inset at the lower-right zooms into one of the squares of Roman's footprint, and the inset at the lower-left zooms in even further. The 18 squares at the top of this image outline the area Roman can see in a single observation, known as its footprint. This synthetic image visualizes what a Roman ultra-deep field could look like.
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