English: Gif animated of the Achird binary system or Eta Cassiopeiae (Eta cas) in the Cassiopeia constellation in the northern sky. File created from free software Celestia 6.0. In the animation: 1 sec = 55 years.
Español: Animación del sistema binario Achird o Eta Cassiopeiae (también denominado Eta Cas), en la constelación boreal Cassiopeia. Imagen producida a partir del sofware libre Celestia 6.0. En la animación: 1 seg = 55 años.
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