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Velocity dispersion of the cluster (as opposed to of only the core). redshift * z, if ≳ 0.1 : 0.8. z (km/s), if ≲ 0.1 : 0.0717 (21 500 km/s) distance NED's default value for the dimensionless Hubble parameter is 0.73 using the WMAP 3-year results, but one is able to change this to match the WMAP 5-year results with h=0.705.
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies , star clusters and emission nebulae .
In this paper, the supercluster was named after Harlow Shapley, in recognition of his pioneering survey of galaxies in which this concentration of galaxies was first seen. Around the same time, Roberto Scaramella and co-workers had also noticed the Shapley Supercluster in the Abell catalogue of clusters of galaxies : they had named it the Alpha ...
A panorama of colliding galaxy clusters glimmers in a new image, captured by the combined forces of the two most powerful space observatories ever created. The cosmic phenomenon, called MACS0416 ...
These fields provide radial velocity values for the galaxy as a whole. The dimensionless quantity z is the redshift parameter and is used when the value is very small, such as less than 0.1. The h_radial_v gives the heliocentric radial velocity of the galaxy in units of km/s.
The following is a list of NGC objects, that is objects listed in the New General Catalogue (NGC). It is one of the largest comprehensive astronomical catalogues for deep sky objects such as star clusters, nebulae, and galaxies. List of NGC objects (1–1000) List of NGC objects (1001–2000) List of NGC objects (2001–3000)
[7] [8] [9] The cluster is estimated to be moving away from us at 23.3 km/s. [1] The diameter of the cluster is 25–26 light-years (7.7–8.0 pc ). It is estimated to be 190 million years old, and cluster properties and dynamics suggest a total life expectancy of 500 million years for this cluster, before it will have disintegrated.
NeVe 1 [2] is a supergiant elliptical galaxy, which is the central, dominant member and brightest cluster galaxy (BCG) of the Ophiuchus Cluster. It lies at a distance of about 411 million light-years away from Earth and is located behind the Zone of Avoidance region in the sky.