Structure Of Virgo Cluster As Determined From Supernovae

The apparent magnitudes of supernovae are used to determine the relative distances of members of the Virgo cluster of galaxies. It is found that the distances so derived differ markedly from the aistances required by a multiple group interpretation of the structure of the cluster. It is suggested that the cluster is essentially a single dynamical unit, and that the differences in galaxy velocities and luminosities, which were observed by de Vaucouleurs, must be explained by means other than differences in the aistances of the galaxies.