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A team of astronomers have discovered objects in the nearby M81 Galaxy Group that may be small , young galaxies that have only recently formed . The Planetary Camera was used to obtain four images of the nuclei of the large elliptical galaxy NGC-4623 which is located in the Virgo Cluster . The Planetary Camera was used to take two observations of the inner core region of the elliptical galaxy NGC-4623 which is located in the Virgo Cluster . Our image shows the central portion of the Virgo Cluster of Galaxies , and is centered on the giant elliptical galaxy M87 which is considered to be the dominant galaxy of the whole giant cluster , situated close to its physical center . Then I was given a commission to write a Hitchiker 's Guide to the Galaxy Companion which was a book that someone else had been hired to write , but they had never done it . In her 40 years of professional activity , she was the author or co-author of more than 60 research papers and galaxy catalogues which have been extensively used by astronomers .