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In four billion years our home galaxy will merge with its nearest large neighbour. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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The Milky Way will collide with the Andromeda Galaxy

In four billion years our home galaxy will merge with its nearest large neighbour

The Andromeda Galaxy is moving towards the Milky Way at roughly 110 kilometres per second. In about 4.5 billion years, the two giant spiral galaxies will begin colliding and eventually merge into a single elliptical galaxy, though individual stars are unlikely to crash directly into each other.

Milky Way and Andromeda encounters (heic2508a) — NASA, ESA, STScI, Till Sawala (University of Helsinki), DSS, J. DePasquale (STScI) · CC BY 4.0 · licence · source

Where this comes from

Encyclopaedia Britannica

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Tags: galaxies, milky way, andromeda

The Milky Way will collide with the Andromeda Galaxy: the short answers

Where does this come from, and can I check it?: In four billion years our home galaxy will merge with its nearest large neighbour. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.