This galaxy could have been the one that affected the fate of our Milky Way disk! We know that the Milky Way had three intense phases of star formation — apparently each of them happened when Sagittarius passed through it. The relatively stable gases and dust of the Milky Way were splashed around by the disruption, creating denser regions which then created new stars much faster. It seems like our Sun was actually born during the first of these episodes. We all owe Sagittarius Dwarf a drink.
Keishinrei 