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Globular cluster - Wikipedia


A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. ... Globular clusters, which are found in the halo of a galaxy, contain .... in such a galaxy is oft...

Chapter 15, Section 4


The seeds of galaxy formation were sown in the very early universe, when .... why supermassive galaxies are often found at the cores of rich galaxy clusters.

Chapter 24, Section 4


The seeds of galaxy formation were sown in the very early universe when .... why supermassive galaxies are often found at the cores of rich galaxy clusters.

Quiz on Galaxy Clusters and AGN


Galaxies are often found in groups called clusters of galaxies. ... In rich galaxy clusters the most common kind of galaxy is elliptical, while in poor clusters and for galaxies not in clusters, spiral types dominate. 6. ... About 1% of all galaxies show signs of activity in their cores. 11. ... The explosion of a supermassive star. B)...

Multiple supermassive black holes in galactic bulges


Nov 1, 2002 ... It is expected that stars will be ejected from galaxy cores as these low mass ratio binaries harden. ... Note that in the models, the mass accretion rate often exceeds the ... If two galaxies with roughly equal mass merge, a binary black hole ... If the supermassive black holes do indeed merge during gas-rich ...

Chapter 15 | SixDay Science


Also, large-scale structure is covered (galaxy clusters and collisions and superclusters). ... The distances between galaxies are large and are often measured in megaparsecs. ... Messier 87: giant elliptical (E1) at the Virgo Cluster's core. .... When Hubble plotted the redshift vs. the distance of the galaxies, he found a ...

Galaxies - University of Oregon


Jan 10, 2011 ... Discovery of Galaxies outside the Milky Way; Hubble's Galaxy Classification ... O & B stars found; Size typically 100,000 light year diameter; Bluish disk, reddish halo & ... No obvious structure; Irr II galaxies often have "explosive" appearance ... Rich clusters (such as Virgo and Coma) - thousan...

Astronomy 123 Test 2 November 18, 2011 Name


Nov 18, 2011 ... 6) In a lobe radio galaxy, the ultimate energy source for the entire galaxy is thought ... 8) Why are supermassive galaxies often found at the cores of rich galaxy clusters? ... B) Many globular clusters swarmed together to form it.

Stars influence the central distribution of dark matter in galaxy clusters


Some of the cluster galaxies (e.g. the bright elliptical galaxy one on the south- east ... would significantly affect the distribution of stars and dark matter in the BCG core. ... by the "universal" profile found in cosmological dark-matter-only simulations. ... suggest that it might explain the large stellar cores often obser...

Elliptical Galaxies - Caltech Astronomy


Mar 2, 2006 ... in the denser regions of the universe, from rich clusters to small groups ... by the bright elliptical galaxy NGC 4874, which is surrounded ... cores, where we often find separate components, even ..... as 'D-type' galaxies, often found in the centers of rich ... A good review of the evidence for supermassive bla...

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Exam 3 Spring 2000 Practice Test 2 - Physics


Where is active star formation most often found in the galaxy? ... Supermassive black holes; Very large star clusters; Galactic collisions; Accretion disks ... Why are supermassive elliptical galaxies often found at the cores of rich galaxy clusters?

Cosmic Evolution - Epoch 2 - Galactic Evolution


We observe loose and tight spiral galaxies having mixtures of old and new stars, large .... explaining why the big ellipticals reside near the core of galaxy clusters and the ... Such cannibalism may also explain why supermassive galaxies— those ... like our Milky Way—are often found near the centers of rich galaxy clusters.

APOD Search Results for "quasar" - Astronomy Picture of the Day


48 items ... Galaxy Zoo enlists the public to help classify galaxies found in the Sloan Digital Sky Survey, and .... APOD: 2004 February 17 - Galaxy Cluster Lenses Farthest Known Galaxy .... a single, central, supermassive black hole, transforming their cores into quasars. ... Explanation: Explorers often discover the unexpected.