An energetic stellar outburst accompanied by circumstellar light echoes

@article{Bond2003AnES,
  title={An energetic stellar outburst accompanied by circumstellar light echoes},
  author={Howard E. Bond and Arne Anthon Henden and Zoltan G. Levay and Nino Panagia and William B. Sparks and Sumner Starrfield and Robert M. Wagner and Romano L. M. Corradi and U. Munari},
  journal={Nature},
  year={2003},
  volume={422},
  pages={405-408}
}
Some classes of stars, including novae and supernovae, undergo explosive outbursts that eject stellar material into space. In 2002, the previously unknown variable star V838 Monocerotis brightened suddenly by a factor of ∼104. Unlike a supernova or nova, it did not explosively eject its outer layers; rather, it simply expanded to become a cool supergiant with a moderate-velocity stellar wind. Superluminal light echoes were discovered as light from the outburst propagated into the surrounding… 
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