Extended Groth Strip
The Extended Groth Strip 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. It covers an area 70 arcminutes across and 10 arcminutes wide, which correlates to a patch of sky roughly the width of a finger stretched at arm's length. 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. The complete image at the highest resolution in JPEG format is nearly 250 megabytes. The Extended Groth Strip is named for Princeton University physicist Edward Groth.