NASA’s Swift Sees ‘Wandering’ Mega Black Hole Shredding Star

NASA’s Neil Gehrels Swift Observatory identified an unusual tidal disruption event, where a supermassive black hole approximately one million times the Sun’s mass tore apart a star located 750 million light-years from Earth. The black hole was observed on the outskirts of its host galaxy, a location previously thought unlikely for such events. Researchers used Swift’s instruments to analyze the event’s ultraviolet and X-ray emissions, confirming the star’s destruction by extreme gravitational forces.

The discovery was initially flagged in November 2025 by the Zwicky Transient Facility, which detected an ultrabright flare in a distant galaxy. An AI algorithm sifted through half a million nightly detections to identify the flare as a potential tidal disruption event, despite its unusual position far from the galaxy’s core. Follow-up observations by the SOAR telescope in Chile and NASA’s Swift provided spectral data, confirming the event’s nature and revealing a temperature of 54,000 degrees Fahrenheit.

Astronomers believe the black hole may have originated in a galaxy’s core before being ejected during a galactic merger. Two scenarios are proposed: either multiple galaxy mergers flung the black hole outward, or a dwarf galaxy’s merger with a larger one caused the black hole to wander. The event challenges previous assumptions about where supermassive black holes and their tidal disruption events could occur.

The discovery highlights a new method for detecting wandering supermassive black holes. Future surveys by the Vera C. Rubin Observatory and NASA’s Nancy Grace Roman Space Telescope will expand the search for such events, potentially revealing more about these elusive objects. Swift’s ongoing observations, pending an orbit boost, may continue contributing to this research, advancing efforts to map the universe’s supermassive black holes.