Anemic Spiral NGC 4921 from Hubble Image Credit: Data - Hubble Legacy Archive, ESA, NASA; Processing - Roberto Colombari How far away is spiral galaxy NGC 4921? Although presently estimated to be about 310 million light years distant, a more precise determination could be coupled with its known recession speed to help humanity better calibrate the expansion rate of the entire visible universe. Toward this goal, several images were taken by the Hubble Space Telescope.