SUNSET: 
Does This Star Cluster Host a Black Hole in Its Core?
The well-known star cluster Messier 4 might have an elusive, midsize black hole hidden at its center, but the evidence isn’t conclusive yet.
Shredded Star Reveals a Dwarf Galaxy’s Central Black Hole
A luminous flare provides astronomers with a rare opportunity to measure the mass of an otherwise quiescent black hole at the center of a dwarf galaxy.
Does the Andromeda Galaxy Harbor a Mid-weight Black Hole?
New observations suggest a black hole 100,000 times the mass of the Sun lurks in the center of a globular cluster of the Andromeda Galaxy.
The Black Hole Files with Camille Carlisle
More Big Black Holes Found in Small Galaxies
In the quest to discover how massive black holes form, astronomers have spotted several of these objects in some of the smallest galaxies yet found to host them.
Scientists See Strong Evidence of Rare Middle-weight Black Hole
New observations give more fuel to the concept of intermediate-mass black holes.
Best Evidence Yet for an Intermediate-Mass Black Hole
An intermediate-mass black hole might be lurking within a dense stellar cluster — a discovery that could point toward how these oddities form.
Brilliant X-ray Flashes from Faraway Black Holes?
Two sources tens of millions of light-years away have sent puzzling X-ray flares blazing our way. Now astronomers think they might have the answer: intermediate-mass black holes.
New Mid-size Black Hole
Astronomers think a bright X-ray source in the galaxy NGC 1313 is a mid-size black hole.
Teeny Supermassive Black Hole
Astronomers have identified the smallest supermassive black hole ever detected in a galaxy’s center.
Potential Mid-size Black Hole Found
Scientists have found what seems to be an intermediate-mass black hole in a spiral galaxy 100 million light-years away. If its size is confirmed, it could provide much-needed insight into black hole evolution.
No Big Black Hole for Two ULXs
Two new studies suggest that ultraluminous X-ray sources are not all created by beefy black holes.
