Universe's early galaxies grew massive through collisions
Wednesday, January 29, 2014 - 14:00
in Astronomy & Space
It has long puzzled scientists that there were enormously massive galaxies that were already old and no longer forming new stars in the very early universe, approximately 3 billion years after the Big Bang. Now new research shows that these massive galaxies were formed by explosive star formation that was set in motion by the collision of galaxies a few billion years after the Big Bang.