Extended Groth Strip

The Extended Groth Strip[1] is an image of a small region between the constellations of Ursa Major and Boötes, based on the results of a series of observations by the Hubble Space Telescope.

The image was assembled from over 500 separate exposures taken with the Space Telescope's Advanced Camera for Surveys at 63 different pointings, spread out over the course of one year from June 2004 to March 2005.

There are at least 50,000 galaxies in its view, giving new clues about the universe's youth, from its "preteen" years to young adulthood.

This uneven distribution of galaxies traces the concentration of dark matter, an invisible web-like structure stretching throughout space.

In 2022 the James Webb Space Telescope was pointed at the Extended Groth Strip by Cosmic Evolution Early Release Science (CEERS).