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When galaxies collide

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Astronomer­s predict that in about 4.5 billion years the Andromeda Galaxy may collide with the Milky Way. The violent crash will result in a blob-like elliptical galaxy, dubbed ‘Milkomeda’. Currently Andromeda is about 2.5 million light years from the Milky Way, but it is moving towards our galaxy at 120 kilometres per second. The possibilit­y of stars and planets within the galaxies actually colliding is highly unlikely, but the different gravitatio­nal fields will jostle them out of their current locations. Our Solar System could even be ejected during the collision, but that probably wouldn’t affect the planets themselves much.

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