Editing Andromeda Galaxy (section)

== Collision with the Milky Way ==
{{Main|Andromeda–Milky Way collision}}
[[File:Collision paths of our Milky Way galaxy and the Andromeda galaxy.jpg|thumb|300x300px|Illustration of the collision path between the Milky Way and Andromeda Galaxy]]
The Andromeda Galaxy is approaching the Milky Way at about {{convert|110|km|abbr=off}} per second.<ref name="nature"/> It has been measured approaching relative to the Sun at around {{cvt|300|km/s}}<ref name="ned"/> as the Sun orbits around the center of the galaxy at a speed of approximately {{cvt|225|km/s}}. This makes the Andromeda Galaxy one of about 100 observable [[blueshift]]ed galaxies.<ref name="Answers"/> Andromeda Galaxy's tangential or sideways velocity concerning the Milky Way is relatively much smaller than the approaching velocity and therefore it is expected to collide directly with the Milky Way in about 2.5–4&nbsp;billion years. A likely outcome of the collision is that the [[Galaxy merger|galaxies will merge]] to form a giant [[elliptical galaxy]]<ref name="Cox & Loeb 2008"/> or possibly large [[disc galaxy]].<ref name="Ueda2014"/> Such events are frequent among the galaxies in [[galaxy group]]s. The fate of 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.<ref name="Cain 2007"/>