Craig Wheeler of the University of Texas in Austin, US, who is not a member of the team, says it is still not known whether middleweight black holes form in globular clusters in the first place. (newscientist.com)
This would be fine, were it not for the fact that studies of globular clusters of stars suggests they are about 15 billion years old. (newscientist.com)
Eugene Magnier of the University of Hawaii, Jan van Paradijs of the University of Amsterdam and astronomers from Bavaria and the Massachusetts Institute of Technology sifted through images of Andromeda, looking for circular smudges the same colour as globular clusters in the Milky Way. (newscientist.com)