OJ 287: New image reveals sharply curved plasma jet at heart of mysterious galaxy
Astrobitica
July 30, 2025 (Last updated: July 30, 2025) 1 minute read
For more than 150 years, the OJ 287 galaxy and its brightness variations five billion light years away has both puzzled and fascinated astronomers, because they suspect two supermassive black holes are merging in the core.