Galaxies and clusters

Galaxies and clusters are the ensembles of stars and other astronomical objects bound together by gravitational forces. Galaxies are ordered into galaxy groups, which are in turn organised into clusters. The Earth is in a galaxy called the Milky Way, which is in the Local Group in the Virgo Supercluster.

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News and Comment

  • Comments and Opinion |

    The 4-metre Multi-Object Spectroscopic Telescope (4MOST) is a versatile optical survey instrument that will be installed on the VISTA telescope in 2022, offering medium- and high-resolution spectra and an innovative operations mode, explains Principal Investigator Roelof de Jong on behalf of the 4MOST Consortium.

    • Roelof S. de Jong
  • News and Views |

    The winds from growing supermassive black holes appear to be located tens of parsecs from the centres of their host galaxies. This location fits with the idea that these outflows influence the progression of star formation.

    • Sarah C. Gallagher
    Nature Astronomy 3, 202-203