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Celestial Album
Pleiades (M45)
04/26/12

 

An image of the Pleiades (M45), a famous star cluster about 135 million years old. This age means that any massive stars in the cluster would have exploded as supernovae when ammonites were prominent in the sea. According to Henrik Svensmark, the rate of nearby supernovae strongly influenced the diversity of such marine invertebrates. Credit: NASA, ESA and AURA/Caltech



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