Astrophysics (index)

Cassiopeia A

(Cas A)
(supernova remnant visible for 300 years)

Cassiopeia A (or Cas A) is a Supernova (SN) about 11000 light-years away that was first visible in about 1680. It was first recorded in 1948. It is much studied. Recently, reflections of it off gas clouds have provided some look at the actual event.


(supernova,event)
http://en.wikipedia.org/wiki/Cassiopeia_A
RedshiftParsecs
/Distance
Lightyears
/Lookback Years
  
~03kpc11.0klyCassiopeia A

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