大冲撞(Collision)

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.
这使得仙女座星系成为一百多个可观测蓝移星系之一。

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.
这次相撞比较可能的结果是两个星系合并成一个大型椭圆星系或圆盘星系。

Such events are frequent among the galaxies in galaxy groups.
在同一个星系群中,星系之间的这类相撞非常常见。

The fate of the Earth and the Solar System in the event of a collision is currently unknown.
对于太阳系而言,包括地球,相撞的结局尤未可知。

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.
星系合并之前,有可能太阳系会被甩出银河系,或者吸入仙女座星系。

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