Lucianofrancesco Massimiliani
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Group Of Galaxies Called "Stephan's Quintet" (Favored Object For Amateur Astronomers With Good Hobby Telescopes). The Quintet Is A Prototype Of A Class Of Objects Known As 'Compact Groups Of Galaxies' - NASA/ESA Hubble Space Telescope

Group Of Galaxies Called "Stephan's Quintet" (Favored Object For Amateur Astronomers With Good Hobby Telescopes). The Quintet Is A Prototype Of A Class Of Objects Known As 'Compact Groups Of Galaxies' - NASA/ESA Hubble Space Telescope