Andromeda
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Stellar stream round Andromeda

South-West Cloud

Open in Ouranos

McMonigal et al. 2016 measure about 757 kpc — at about M31's distance.

Measured

Distance
about 2.5 million light-years

How far, from the Sun

About 2.5 million light-years. To cross it:

  • Light2.5 million years
  • Voyager 1's speed44.4 billion years
  • Driving at 100 km/h27 trillion years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Where this comes from

  • McConnachie et al. 2018, ApJ 868, 55, Fig. 12 (outline, approximate); McMonigal et al. 2016

Every catalogue Ouranos draws is credited on the credits page.