Hubble has previously found some evidence of black holes in this intermediate range, ... A Hubble Space Telescope image of the globular star cluster Messier 4.

A Hubble Space Telescope view of the globular star cluster, Messier 4, home to several hundred thousand densely-packed stars. Astronomers now suspect that a black hole weighing as much as 800 ...

A new image from ESO’s La Silla Observatory in Chile shows the spectacular globular star cluster Messier 4. This ball of tens of thousands of ancient stars is one of […] ...

They looked at Hubble's observations of Messier 4 from a 12-year period, watching how stars moved near the cluster's core, "like bees swarming around a hive," NASA explained.

Hubble's unique capabilities have now been used to zero in on the core of the globular star cluster Messier 4 (M4) to go black-hole hunting with higher precision than in previous searches.

Messier 4 is about 6,000 light years away. It took 12 years of Hubble observations in order to map the motion of the stars and discover the invisible mass hidden in its center.

Galaxies come in all shapes and sizes, and the galaxies most pleasing to the eye are always in the most recognizable shapes. Dramatic spirals with … ...

Astronomers followed up on the Gaia observations with 12 years of Hubble data on stars in Messier 4, allowing the team to pinpoint a substantial mass. "We have good confidence that we have a very ...

A Hubble Space Telescope image features the star cluster Messier 79 doing its best snow globe imitation. The mass of stars is a 'globular' cluster, after all.