A quasar is a compact region surrounding a supermassive black hole and
emitting enormous .... Quasars inhabit the very center of active, young galaxies,
and are among the most ... This implies an ex...
May 1, 2013 ... This explains why galaxies are grouped in clusters and even clusters ... the
elliptical galaxies while the lower density concentrations would ... stars that star-
star collisions are very rare when the galaxies collide. ... found close to the
centers of galaxies were formed from the collision and merging of galaxies.
Gravity, Part 4: Globular Clusters & Galaxies: The dynamics of globular ... this: all
stars in the cluster move in Kepler orbits around the center of mass. ... Some
sections of the galaxy have lots of stars (lots of mass per volume or high density);
other ... to believe physical collisions between stars were extremely rare and
Nov 14, 2013 ... This cluster of stars is known as Messier 15, and is located some 35 ... This
glittering cluster contains over 100 000 stars, and could also hide a rare type ... or
as a result of a collision between massive stars in dense clusters. ... Related
Stories ... a globular star cluster located close to the center of the galax...
Dec 23, 2015 ... ... between stars are so vast that collisions are incredibly rare. ... The density of
stars there is higher than anywhere else in the galaxy ... But if you live in a
globular cluster or near the center of the galaxy, you ... Related posts.
Jun 29, 2016 ... A new Frontier Fields release from the Chandra X-ray Center highlights the
energetic chaos that occurs when massive galaxy clusters collide. ... The galaxy
cluster MACS J0416 seen in X-rays (blue), visible light (red, green, ... be
observable without the benefit of magnification due to gravitational lensing.
Stars, gas, and interstellar dust orbit the center of the galaxy due to the
gravitational ... The Milky Way has more than a hundred billion stars, but the stars
are so far apart that they almost never collide. ... ago, because galaxies are likely
to have formed first in high-density regions like galaxy clusters. ... Irr II galaxies
Jan 22, 2004 ... We compare new maps of the hot gas, dark matter, and galaxies for 1E 0657–56,
a cluster with a rare, high- ... Subject headings: dark matter — galaxies: clusters:
individual .... The surface density toward the subcluster center is several .... slowly
diminishing due to DM collisions, its galaxies did not.
Astronomers also use studies of binary galaxies and galaxy clusters to obtain ...
Galaxy collisions can occur, but are extremely rare. ... In the Tully—Fisher relation
, a galaxy's luminosity is found to be related to the ______ of its spectral lines. ...
400 km/s in a circular orbit of radius 1 Mpc around the center of a galaxy clus...
Jul 27, 2014 ... While individual galaxy clusters usually can't tell us much, a large sample ... By
contrast, the amount of dark matter increases toward the galaxy's center, so the
density should be much higher in ... so that their (very rare) collisions result in
mutual destruction and some high-energy photons. ... Related Stor...