Astronomers have observed a bright one-sided jet of material ejected at three-quarters the speed of light from the core of the blazar PSO J030947.49+271757.31 (hereafter PSO J0309+27). VLBA image of PSO J0309+27. Image credit: Spingola et al. / Bill Saxton / NRAO / AUI / NSF. Blazars are active galactic nuclei with relativistic jets of matter speeding towards us almost head-on at the speed of light. They glow not just with visible light, but with...
