
Precessing Black-Hole Jets Quench Star Formation in a Merging Galaxy
Astronomers studying the nearby merging galaxy VV 340a detected kiloparsec-scale, precessing jets from its central black hole that heat and eject coronal gas, removing star-forming material at roughly 19 solar masses per year—an unusually large-scale example of black-hole feedback that may suppress star formation, though the merger could later reignite it.











