Where next?

Length & distance

Just how long is 2,500,000 light-years?

Deep space

2,500,000 ly

Scale
2,500,000 light-years

The quantity is exact as entered.

766.5 kpcLength
0 - shared origin
Distance to Andromeda

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

766.5 kpcDistance
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.

A little perspective

2,500,000 light-years is approximately equal to the distance to Andromeda.

Measurements, assumptions & sources +

2,500,000 light-years

Length: 766.5 kpc; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Distance to Andromeda

Distance: 766.5 kpc; approximate.

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

NASA — The galaxy next door

The marked distance is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 2,500,000 light-years with the distance to Andromeda. The notes below explain how each value was chosen.

2,500,000 light-years

766.5 kpc

Length · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Distance to Andromeda

766.5 kpc

Distance · approximate

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

Comparing
Length ↔ Distance
Relative size
2,500,000 light-years is approximately equal to the distance to Andromeda.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The distance to Andromeda: This is an estimate; check the notes for its rounding and uncertainty.

This comparison follows the selected length only; other dimensions may differ.

2.3652 × 10²² mmetres
7.7598 × 10²² ftfeet
1.4697 × 10¹⁹ mimiles
1.581 × 10¹¹ AUastronomical units

Change your perspective

Put it next to…

Choose a suggestion to redraw the comparison, or open its page to learn what it is.

About this thing
About this thing
About this thing
About this thing
About this thing
About this thing

The full collection

Choose something to compare.

Loading compatible things…

A little smaller. A little larger.

Keep exploring length.

See all ↗

Share a little perspective.