13 Billion Year Old Ghost Galaxies Are Fossils Of The Early Universe
Tuesday, July 10, 2012 - 16:10
in Astronomy & Space
Why do some extremely faint galaxies in our backyard contain so few stars? An international team of astronomers has helped solve the mystery of why these galaxies are starved of stars - and why so few of them have been found.Hercules, Leo IV and Ursa Major dwarf galaxies all started forming stars more than 13 billion years ago - and then abruptly stopped shortly after the Big Bang.The extreme age of their stars is similar to Messier 92, the oldest known globular cluster in the Milky Way. read more