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Distance to Andromeda vs Milky Way: length comparison

The distance to Andromeda is about 25 times the diameter of the Milky Way. Selected basis: approximate values.

Distance to Andromeda
Distance
Milky Way
Diameter
Scale
Distance to Andromeda
766.5 kpcDistance
0 - shared origin
Milky Way
30.66 kpcDiameter
0 - shared origin

Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.

In perspective25 times
Measurements, assumptions & sources

Distance to Andromeda

766.5 kpc - Distance; approximate.

This is the distance between the Milky Way and the Andromeda galaxy, our nearest large galactic neighbour.

Approximate distance to our large galactic neighbour. This measures separation, not the galaxy’s diameter.

NASA — The galaxy next door

Milky Way

30.66 kpc - Diameter; approximate.

The Milky Way is a spiral galaxy containing hundreds of billions of stars, including our Solar System.

A rounded 100,000 light-year span of the stellar disk. Faint stars and the dark-matter halo extend farther; galaxies have no crisp rim.

NASA — Galaxies

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Distance to Andromeda vs Milky Way