The COSMOS field, or the Cosmic Evolution Survey Deep Field, is a stitched photograph of deep space, which was photographed with the Hubble Space Telescope's Advanced Camera for Surveys in segments from 2003 to 2005, and was supported by several other ground-based and space-based telescopes.[1] It was the capstone of the COSMOS project, which aimed to observe and study how galaxies are affected by celestial environments.