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A new study led by European scientists presents the most comprehensive analysis of data from the most ambitious survey ever undertaken by the NASA/ESA Hubble Space Telescope. These researchers have, for the first time ever, used Hubble data to probe the effects of the natural gravitational “weak lenses” in space and characterise the expansion of the Universe. Dr. Martin Kilbinger of the Junior Resarch Group “Observational Astrophysics” at the Excellence Cluster Universe is one of the co-authors of the study to be published in an upcoming issue of Astronomy and Astrophysics.
A group of astronomers led by Tim Schrabback of the Leiden Observatory, conducted an intensive study of over 446.000 galaxies within the COSMOS field, the result of the largest survey ever conducted with Hubble. In making the COSMOS survey, Hubble photographed 575 slightly overlapping views of the same part of the Universe using the Advanced Camera for Surveys (ACS) onboard Hubble. It took nearly 1000 hours of observations.