File:Millions of Galaxies Emerge in New Simulated Images From NASA's Roman (SVS14301 - Roman Survey Scale Final).jpg

English: This graphic compares the relative sizes of the synthetic image (inset, outlined in orange), the whole area astronomers simulated (the square in the upper-middle outlined in green), and the size of the complete future survey astronomers will conduct (the large square in the lower-left outlined in blue). The background, from the Digitized Sky Survey, illustrates how much sky area each region covers. The synthetic image covers about as much sky as a full moon, and the future Roman survey will cover much more area than the Big Dipper. While it would take Hubble or Webb around a thousand years to image an area as large as the future survey, Roman will do it in just over seven months. Credit: NASA’s Goddard Space Flight Center and M. Troxel