A superluminal source in the Galaxy

@article{Mirabel1994ASS,
  title={A superluminal source in the Galaxy},
  author={Igor Felix Mirabel and L. F. Rodŕıguez},
  journal={Nature},
  year={1994},
  volume={371},
  pages={46-48}
}
APPARENT velocities greater than the speed of light (superluminal motion) have been inferred for radio-emitting components in a number of distant quasars and active galactic nuclei1. These components move away from the central sources (generally thought to be super-massive black holes) at rates that seem to imply velocities greater than c. The accepted explanation is that clouds of plasma are ejected in opposite directions from the central source at speeds close to (but less than) that of light… 
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