M81和M82的星系大战

2020 May 15 Galaxy Wars: M81 and M82 Image Credit & Copyright: Dietmar Hager, Torsten Grossmann Explanation: These two galaxies are far far away, 12 million light-years distant toward the northern constellation of the Great Bear. On the left, with grand spiral arms and bright yellow core is spiral galaxy M81, some 100,000 light-years across. On the righ...