A mysterious streak of light, first spotted in 2023, is a trail of a supermassive black hole tearing through space. This is a long predicted phenomena, however, this is the first observational confirmation obtained.
Using the James Webb Space Telescope (JWST) images, astronomers confirmed on Dec. 3, 2025 that this black hole has been ejected from its host galaxy. At roughly 10 million times the mass of the Sun, it’s plowing through surrounding gas nearly 8 billion light years away. The object was first spotted in Hubble Space Telescope images, leaving behind a narrow trail of gas and newly formed stars stretching nearly 200,000 light-years.
Follow up observations using the JWST images showed clear signs that the streak is being powered by a fast moving compact object at its front. Scientists say the readings are consistent with a black hole traveling at roughly 1,000 kilometers per second.
Runaway black holes have been predicted for years, but no confirmed examples have ever been found. Such phenomena can occur when two black holes collide or interact during galaxy mergers, producing a powerful kick that sends one of them flying into intergalactic space. “Two things can happen,” said Dr. Tiffany Lewis, a physics faculty member at MTU. “Either they can merge, which would be called a major merger. But because the system is so chaotic, you have one black hole that gets to take over the joint galaxy and the other one gets kicked out.”
Earlier candidates either lacked clear evidence or were later reclassified as unusual galaxies. The JWST’s data provided the first definitive signatures, including shock waves at the leading edge of the trail and a long, turbulent wake behind it, confirming the object’s motion through surrounding gas.
