Earth's Distance from 200 Galaxies Revealed by Astronomers

Astronomers have used the James Webb Space Telescope's (JWST) first image, Webb's First Deep Field, to measure the distances of nearly 200 galaxies whose distances from Earth were previously unknown. Using the NIRISS instrument onboard the JWST, the team measured the redshifts of these galaxies, revealing their distances based on the stretching of light as the universe expands. The study provides valuable insights into galaxy evolution, the distribution of dark matter, and the formation of structures in the universe. Additionally, the researchers discovered three new galaxy overdensities, potentially newly discovered galaxy clusters located eight to 10 billion light years away.