NASA Discovers Rare ‘Orphan’ Black Hole Devouring Star Outside Galaxy Core in 1st-of-Its-Kind Observation

NASA has captured one of the rarest cosmic events ever observed after its Neil Gehrels Swift Observatory detected an "orphan" black hole lighting up while tearing apart a star far from the centre of its host galaxy. The discovery marks the first time astronomers have identified such a tidal disruption event (TDE) at such a great distance from a galaxy's core, offering a new way to locate otherwise invisible wandering supermassive black holes.

The black hole, estimated to be about one million times the mass of the Sun, lies roughly 750 million light-years from Earth and is positioned more than 30,000 light-years away from the centre of its galaxy. Researchers believe the finding could help uncover a hidden population of supermassive black holes that do not reside in galactic centres, where they are traditionally expected to be found. What Are Black Hole UFOs? Scientists Detect Most Powerful Ultra-Fast Outflows Yet.

Rare Tidal Disruption Event Detected

The event was first identified in November 2025 when the Zwicky Transient Facility (ZTF) at California's Palomar Observatory detected an unusually bright flare. Scientists later confirmed that the flare was produced after a star wandered too close to the black hole and was ripped apart by its immense gravitational pull.

Known as a tidal disruption event, or TDE, the phenomenon temporarily outshone the galaxy itself in ultraviolet light, radiating with the brightness of nearly 10 billion Suns for several months. Black Hole in Cosmic Horseshoe Galaxy Could Be the Largest Ever Detected.

"We were looking for these star-shredding events as a way to find otherwise invisible supermassive black holes wandering away from the galactic cores where they usually reside," said Robert Stein, a research fellow at The University of Maryland, College Park and NASA's Goddard Space Flight Center.

"With this discovery, which is one of just a couple that have been confirmed so far, we've validated a new technique and can use it to hunt for more."

NASA's Swift Observatory Helped Confirm The Discovery

Following the initial detection, astronomers used multiple observatories, including the Southern Astrophysical Research (SOAR) telescope in Chile and NASA's Neil Gehrels Swift Observatory, to study the flare across different wavelengths.

Swift's Ultraviolet/Optical Telescope measured the object's temperature at approximately 54,000 degrees Fahrenheit (30,000 degrees Celsius), strengthening evidence that it was indeed a tidal disruption event.

"The combination of all this data helped us rule out other explanations and confidently say it's a tidal disruption event, despite its strange location," said Jonathan Carney, a doctoral student at the University of North Carolina at Chapel Hill.

Why Is This Black Hole Called An 'Orphan'?

Nearly every known galaxy hosts a supermassive black hole at its centre. However, this black hole sits far from the galactic core, earning it the nickname "orphan" or "wandering" black hole.

Researchers have proposed two possible explanations for its unusual location. One theory suggests that multiple galaxies merged in the past, causing gravitational interactions that flung the lightest black hole to the outskirts. Another possibility is that the black hole belongs to a dwarf galaxy that is still merging with the larger galaxy, and one of its stars drifted too close to the black hole.

"It must have originated in a galaxy's center, but not the one it's in the outskirts of now," Stein said.

"We think the host galaxy's supermassive black hole is still at its core, but the one eating the star could have started off in a small galaxy that merged with the big one we see today."

How Rare Are Tidal Disruption Events?

Tidal disruption events are exceptionally rare. NASA estimates that a star wanders close enough to a supermassive black hole to trigger such an event only about once every 100,000 years in a typical galaxy.

Astronomical surveys detect roughly 30 TDEs each year across millions of galaxies. Until recently, nearly all had been observed in galactic centres because that was where astronomers expected supermassive black holes to reside.

The newly discovered event is among only a handful confirmed outside galaxy cores and is the first optical tidal disruption event detected so far from a galaxy's centre.

What The Discovery Means For Future Research

Scientists believe the observation validates a new method for locating hidden supermassive black holes that may have been overlooked.

Future surveys by the Vera C. Rubin Observatory and NASA's upcoming Nancy Grace Roman Space Telescope are expected to detect many more off-centre tidal disruption events, helping astronomers better understand how common wandering black holes are across the universe.

"Further discoveries could reveal the origin of this apparent 'orphan' black hole," Stein said. "The key science question we want to answer is: How common are wandering black holes?"

(The above story first appeared on LatestLY on Jul 29, 2026 03:45 PM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).