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Open cluster NGC 1605 is actually two clusters with different age

The two clusters designated NGC 1605 a and b are in a process of merging. Their stars are 600 millions and 2 billions years old. New information comes from telescopes WISE and Gaia.

missions icon WISE 14. 12. 2009 Ongoing
missions icon Gaia 19. 12. 2013 Ongoing

Open Cluster NGC 1605

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