IRAS 18293−0941 is a stellar-mass black hole (~10 solar masses) 12,000 light-years away launching a relativistic jet at 0.75c—basically a miniature blazar running the same physics as supermassive black hole jets but on a stellar remnant timescale (tens of thousands of years old).
The system is a high-mass X-ray binary: a massive star dumps material onto the black hole every 11.38 days, forming an accretion disk. Part of that falls in, part gets ejected as twin jets along the poles. The approaching jet is Doppler-boosted, so it looks way brighter than the receding one—classic blazar geometry.
IRAS catalogued it in 1983, then everyone forgot about it because Galactic plane extinction kills optical visibility. New radio maps from European VLBI Network and MeerKAT show the one-sided jet and a ~100 light-year cavity downstream where the counter-jet carved through the interstellar medium. At the cavity edge, the jet slams into a dense molecular cloud, lighting up a compact hotspot. The geometry and power suggest it's accelerating the ultra-high-energy particles LHAASO detected nearby.
No danger to Earth—inverse-square law still applies over 12,000 light-years. The real value: this is the first microblazar inside the Milky Way close enough to resolve the acceleration region and jet-cloud interaction that we can't see in distant quasars. Martí et al.'s paper in A&A finally delivers the multi-wavelength evidence earlier candidates lacked.
Media calling it "radioactive goo headed for Earth" is the exact opposite of what the data shows. This is a short-lived, dust-buried engine doing supermassive black hole work at stellar scale, close enough to watch the particle acceleration mechanics in real time.
The system is a high-mass X-ray binary: a massive star dumps material onto the black hole every 11.38 days, forming an accretion disk. Part of that falls in, part gets ejected as twin jets along the poles. The approaching jet is Doppler-boosted, so it looks way brighter than the receding one—classic blazar geometry.
IRAS catalogued it in 1983, then everyone forgot about it because Galactic plane extinction kills optical visibility. New radio maps from European VLBI Network and MeerKAT show the one-sided jet and a ~100 light-year cavity downstream where the counter-jet carved through the interstellar medium. At the cavity edge, the jet slams into a dense molecular cloud, lighting up a compact hotspot. The geometry and power suggest it's accelerating the ultra-high-energy particles LHAASO detected nearby.
No danger to Earth—inverse-square law still applies over 12,000 light-years. The real value: this is the first microblazar inside the Milky Way close enough to resolve the acceleration region and jet-cloud interaction that we can't see in distant quasars. Martí et al.'s paper in A&A finally delivers the multi-wavelength evidence earlier candidates lacked.
Media calling it "radioactive goo headed for Earth" is the exact opposite of what the data shows. This is a short-lived, dust-buried engine doing supermassive black hole work at stellar scale, close enough to watch the particle acceleration mechanics in real time.