By Daniel Fischer, Hilmar Duerbeck (auth.)
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Additional info for Hubble Revisited: New Images from the Discovery Machine
And r d hift f r individual gaJaxie can b mea ured directly u ing th largest telc cop on Earth. Again, a urpri ing re ult occurred: 40 percent of the di tance determined f r 140 alaxie using the lOom ter K ck t Ie cope are concentrated around ix di tinct value ! Thi re ult indicate that galaxie throughout the univer e are concentrated in bubble- or heetlike tructure with great void b twe n them. We must realize, howev r, that the Hubble eep Field with it tiny 6 ld f view i pr bing the univer e only in a ingIe direction.
The target area, about one-thirtieth the size of the full Moon, is located in the constellation Ursa Major, also known as the Big Dipper, a small distance north of the star Delta Ursae Majoris (the star at which the handle is attached to the cup of the Big Dipper). Known as the Hubble Deep Field (HDF), this tiny part of the sky has become an astronomical celebrity. During 10 contiguous days between December 18 and 28, 1995, a total of 342 exposures in four colors were taken with the WFPC2. Over the next few weeks, an international team of astronomers processed and calibrated the images, added the individual color exposures together, and finally combined them into a single color image.
These possibilities have lifted the field of observational cosmology to a fundamentally new level of quality and accuracy. Only to the question of questions-why are the values of the var- 64 ious parameters what they are, and not something else (zero, for instance)? -can Hubble not provide an answer. For now. Searching for the Building Blocks of Galaxies The search for the ongm of today's galaxies has always been one of the central tasks of astrophysics. The Hubble Deep Field had already demonstrated the change in the appearance of the universe over the last several billion years.