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File:Klingon sun.jpg

The Klingon sun.

The Klingon system was the primary star system of the Klingon Empire and the location of the planet Qo'noS and the moon Praxis. (TNG: "Sins of the Father"; Star Trek VI: The Undiscovered Country)

In 2151, it took four days for Enterprise NX-01 to travel from the Sol system to the Klingon system. (ENT: "Broken Bow")

This travel time seems problematic, as given Enterprise's maximum speed of Warp 4.5 at the time, the Klingon system would be extremely near to Earth, much closer even then Proxima Centauri.

In 2293, the moon Praxis exploded within the system and caused an environmental disaster on the planet Qo'noS. (Star Trek VI: The Undiscovered Country)

The term "Klingon system" was only referenced once, by Kurn in "Sins of the Father." The star, which was seen as the USS Enterprise-D and IKS Bortas approached Qo'noS in "Redemption", was never given a formal name.
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