Quick Read

Laniakea is an immense network of galaxy groups moving within a shared gravitational flow.

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Its representative boundary spans about 520 million light-years and is defined by galaxy velocities rather than a sharp visible edge.

In Depth

Laniakea is a dynamical basin of attraction whose boundary can change with distance data, velocities, and cosmological models.

Scale measurement

520,000,000 ly · boundary

Quick facts

  • It is defined from galaxy flows.
  • It includes the region containing the Local Group.
  • Its boundary is model-dependent.

Related objects

Sources and review