NASA's Swift Observatory Detects 'Orphan' Black Hole Shredding a Star

• NASA's Neil Gehrels Swift Observatory detected a supermassive black hole consuming a star far from its galaxy's center.
• This "orphan" black hole was identified using a new AI algorithm and confirmed via multi-telescope observations.
• The discovery validates a search technique for wandering black holes that exist outside of typical galactic cores.

The Event

• Astronomers identified a tidal disruption event in a galaxy located 750 million light-years away.
• The black hole has a mass approximately one million times that of the Sun.
• The event was initially flagged in November 2025 by the Zwicky Transient Facility (ZTF).
• For several months, the event's ultraviolet radiation output rivaled that of 10 billion suns.
• NASA's Swift UVOT instrument measured the event's temperature at roughly 54,000 degrees Fahrenheit (30,000 degrees Celsius).

Understanding Wandering Black Holes

• While most galaxies host a black hole at their center, tidal disruption events rarely occur elsewhere.
• Researchers hypothesize the black hole reached its current location through galactic mergers—either by being flung out during a multi-galaxy collision or by being part of an infalling dwarf galaxy.
• This finding is only the second confirmed case of such an event occurring deep in a galaxy's outskirts.

Future Research

• Swift is currently awaiting an orbit boost to extend its mission and continue monitoring such events.
• Scientists plan to use the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope to find more off-center tidal disruption events, potentially uncovering the prevalence of wandering black holes.