If not from single stars, then from globular star clusters.

They simply don't have enough gravity to hold them together, unlike their much more massive cousins, the globular star clusters.

John Herschel was the first to described it as a globular star cluster during his observations in the 1830s.

It was not clear yet, astronomers said, whether all or even most globular star clusters harbor these intermediate black holes.

The planet was found in the heart of a group of extremely ancient stars, known as a globular star cluster.

But the younger figure falls short of the age of the globular star clusters, and no one wants a universe younger than its parts.

Studying globular star clusters is critical to understanding the early, intense star-forming episodes that mark galaxy formation.

Astronomers have long known that the giant elliptical galaxy at the cluster's center, M87, hosts a larger than predicted population of globular star clusters.

NGC 1987 is a globular star cluster in the constellation Mensa.

Globular star clusters, now-- they'd be easy to identify; snag four of them and you'd know where you were as clear as reading a street sign.

Hubble resolves thousands of globular star clusters orbiting ESO 325-G004.

The planet is located in the globular star cluster M4, about 5,600 light years from Earth in the constellation Scorpius.

A fraction of the globular star clusters in our Galaxy, as well as those in other massive galaxies, might have formed in situ.

SEDS page on "Globular Star Clusters"

The second released VST image (left) may be the best portrait of the globular star cluster Omega Centauri ever made.

Only 44 light-years from Arkon, this system belonged to the centre of the globular star cluster M-13, the foundation of the Arkonide Empire.

It was a little like being at the center of a dense globular star cluster, O'Mara thought, and rather beautiful if you were in a mood to appreciate it.

Identified as a globular star cluster in 1867, Omega Centauri is one of roughly 150 such clusters in our Milky Way Galaxy.

The globular star cluster 47 Tucanae, which is made up of about 1 million stars, is one of the densest globular clusters in the Southern Hemisphere.

Extending above and beyond these spiral arms is the galactic halo, a sparsely populated region containing globular star clusters that support the more senior members of the galactic family.

But if the preliminary results from the Hubble Space Telescope hold, they are on the near side, and the universe appears younger than the oldest globular star clusters - which obviously won't do.

Globular star clusters, on the other hand, are not currently forming stars because this activity happened billions of years ago and then stopped once all of the gas and dust clouds were used up.

Dr. Harvey Richer, a member of the group from the University of British Columbia in Vancouver, said it was "tremendously encouraging that planets are probably abundant in globular star clusters."

Astronomers have found evidence for a medium- size black hole at the core of Omega Centauri, one of the largest and most massive globular star clusters orbiting our Milky Way Galaxy.

The sharp vision of Hubble's Advanced Camera for Surveys uncovered the speedy white dwarfs in the ancient globular star cluster NGC 6397, a dense swarm of hundreds of thousands of stars.