What does this number measure?
A large collection of galaxies dominated by their collective gravity. The Virgo Cluster includes the elliptical galaxy M87. Its galaxies are separated by immense volumes of gas and space; their illustrated arrangement is simplified.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Virgo Cluster: illustrative reconstruction of the distribution; galaxies are enlarged, with approximate positions and boundaries.