Recommended size to fit a standard frame: 78x52 inches (original size: 133x18 inches at 300 PPI, 215 MP). Many other sizes available. Click 'Customize it!' on the right.
A poster of the Groth Strip would be 133 inches by 18 inches at 300 ppi. To make it easier to print, the strip was cut in half and the two strips placed side by side. Minor editing removed artifacts and the field of galaxies appears seamless.
The Extended Groth Strip is an image of a small region in the constellation Ursa Major, 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 arms length. The image was assembled from over 500 separate exposures taken with the Space Telescope's Advanced Camera Survey 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 "pre-teen" years to young adulthood. The snowstorm of galaxies in the Hubble panorama does not appear evenly spread out. Some galaxies seem to be grouped together. Others are scattered through space. This uneven distribution of galaxies traces the concentration of dark matter, an invisible web-like structure stretching throughout space. Galaxies form in areas rich in dark matter.
The Extended Groth Strip is named for Princeton University physicist Edward Groth. The project is jointly led by Sandra Faber, professor of physics and astronomy at the University of California at Santa Cruz, and Marc Davis, professor of astronomy at the University of California at Berkeley.
Credit: NASA, ESA, and M. Davis (University of California, Berkeley)