The planet Ba'ku is an M-class planet located in Sector 441, within the Briar Patch. (Star Trek: Insurrection)

Ba'ku is a ringed planet, the rings themselves being saturated with metaphasic radiation. The planet is home to a Ba'ku settlement, established in 2066 by a group of approximately 600 of the Ba'ku, fleeing their homeworld for fear of their race's self-destruction. The planet's radiation allowed the inhabitants to live extended lifespans, In the late 23rd century, a group of the Ba'ku, disillusioned with the settlement's ways, left the planet, and became the Son'a.

In 2375, an attempt by the Son'a - led by Ahdar Ru'afo, and assisted by Starfleet officers under Matthew Dougherty - to strip the planet of its metaphasic particles, was stopped by the actions of Jean-Luc Picard and the crew of the USS Enterprise-E.

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