Using gravitational
lensing, Astronomers University of Utah (USA) found that the center of massive
galaxies will ultimately become denser than normal galaxies.
"We found that
over the past 6 billion years matter making massive elliptical galaxies,
gaining a greater concentration in their centers. This is evidence that large
galaxies collide with each other in order to create an even greater - says
astronomer Adam Bolton, Lead author of the work.
