An important clue to which perspective was right seemed to be hidden in the nebulae—fuzzy smears of light ("nebula ... Andromeda Galaxy, and their retinue of a few dozen smaller galaxies make up ...

The sun, for example, could end up much farther away from the center of its new egg-shaped galaxy ... a probability of close to 50 percent that there is no Milky Way - Andromeda merger during ...

One clue comes from how close these ... in the Andromeda galaxy. This merger could have contributed to making the environment around Andromeda more dynamic, as well as bulking up Andromeda itself ...