Extragalactic astronomy

dust floating in space

morphological classification scheme for galaxies invented by Edwin Hubble

system for categorizing galaxies based on how they look like

individual galaxy whose gravitational field disturbs another galaxy

astronomy dealing with objects outside the Milky Way

in astronomy, the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer

galaxy that orbits a larger galaxy due to gravitational attraction

star not located within any galaxy

planet that is outside the Milky Way Galaxy

tidal force experienced by objects subject to the gravitational field of a galaxy

trend in astronomy

cosmic dust in between galaxies in intergalactic space

coordinate system

superheated plasma that permeates a galaxy cluster

velocity of an object relative to a rest frame

theory to explain the spiral arm structure of spiral galaxies

geographic region

in astronomy, the statistical dispersion of velocities about the mean velocity for a cluster of stars or galaxies

MilkyWay@home is a volunteer computing project in the astrophysics category, running on the Berkeley Open Infrastructure for Network Computing (BOINC) platform. Using spare computing power from over 38,000 computers run by over 27,000 active volunteers , the MilkyWay@home project aims to generate accurate three-dimensional dynamic models of stellar streams in the immediate vicinity of the Milky Way. With SETI@home and Einstein@home, it is the third computing project of this type that has the investigation of phenomena in interstellar space as its primary purpose. Its secondary objective is to

empirical power-law relation between the luminosity and the central stellar velocity dispersion of elliptical galaxy

astronomical survey that combines observations from 3 great NASA observatories

which shows an empirical relationship among mean surface brightness, velocity dispersion and effective radius of an elliptical galaxy

Photon field that fills our universe

cooling of the intracluster medium in galaxy clusters

function that describes the distribution of galaxies in the universe