The Andromeda Galaxy is approaching the Milky Way at about 110 kilometres per second (68 mi/s).
仙女座星系以每秒钟 110 公里的速度靠近银河系。

It has been measured approaching relative to our Sun at around 300 kilometres per second (190 mi/s) as the Sun orbits around the center of our galaxy at a speed of approximately 225 kilometres per second (140 mi/s).
经过测量,仙女座星系相对太阳系的速度接近每秒钟 300 公里,因为太阳还在环绕银河系的中心以大约每秒钟 225 公里的速度公转。

This makes the Andromeda Galaxy one of about 100 observable blueshifted galaxies.

Andromeda Galaxy's tangential or side-ways velocity with respect to the Milky Way is relatively much smaller than the approaching velocity and therefore it is expected to directly collide with the Milky Way in about 4 billion years.
仙女座星系对银河系的切向速度或侧向速度相对接近速度要小得多,因此两个星系直接相撞的预估时间为距今 40 亿年后。

A likely outcome of the collision is that the galaxies will merge to form a giant elliptical galaxy or perhaps even a large disc galaxy.

Such events are frequent among the galaxies in galaxy groups.

The fate of the Earth and the Solar System in the event of a collision is currently unknown.

Before the galaxies merge, there is a small chance that the Solar System could be ejected from the Milky Way or join the Andromeda Galaxy.