Binary supermassive black hole - Ireland

This RadioAstron map two supermassive black holes at the center of OJ 287, a galaxy located about 5 billion light-years away in the constellation of Cancer: if the central component corresponds to the primary black hole, then the next one upwards marks the secondary black hole, and the highest component represents a knot in its jet; the elongation of the individual components is not real, but is a reflection of the beam shape. Image credit: Valtonen et al., doi: 10.3847/1538-4357/ae057e.

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RadioAstron Captures Radio Image of Two Supermassive Black Holes Circling Each Other

October 10, 2025

Using data from the RadioAstron satellite, astronomers have produced a radio image of two supermassive black holes at…