SMRTR Science & EngineeringJan 8, 2026Scientific American

Supermassive Black Hole ‘Snowplows’ Can Stifle Star Formation in Spiral Galaxies

SMRTR summary

Astronomers discovered a supermassive black hole in galaxy VV 340A shooting out a wobbling, S-shaped jet that acts like a cosmic snowplow, pushing away star-forming gas at 20 solar masses per year. This unprecedented precessing jet, observed using the James Webb Space Telescope and other instruments, shortens the galaxy's star-forming lifespan by 250 million years.

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