COSMOS field

The COSMOS field was chosen to be the focal point of research due to its abundance of galaxies and other celestial bodies, and its scarcity of gas.

It was aimed at observing the correlation between galaxies, star formations, active galactic nuclei and dark matter[5] and how they evolve, with large-scale structures of the universe.

The survey included imaging in multiple wavelengths and spectroscopic analysis from X-rays to radio waves, in a region of two square degrees in the Constellation Sextans.

Combined with the fact that the area of sky proposed as a survey had never been the subject of observations,[7] the project has stimulated the main world astronomical structures to explore the sky in this direction, thus resulting in one of the most substantial, deepest and most uniform data sets in the entire electromagnetic spectrum.

[10] HubbleSite states that "the COSMOS field is Hubble's largest contiguous survey of the universe, that covers two square degrees of sky.