Edge on NGC 3628 . ... Credit Copyright: Stephen Leshin Explanation: Sharp telescopic views of magnificent edge-on spiral galaxy NGC 3628 show a puffy galactic disk divided by dark dust lanes. ... About 100,000 light-years across and 35 million light-years away in the constellation Leo, NGC 3628 shares its neighborhood in the local Universe with two other large spirals, a grouping otherwise known as the Leo Triplet . ... NASA Web Site Statements, Warnings, and Disclaimers . ...