Nibiru was a class M world that the USS Enterprise was assigned to observe in 2259 of the Nero-created alternate reality (TOS - Countdown to Darkness comic: "Issue 4"; TOS video game: Star Trek; TOS movie & novelization: Star Trek Into Darkness; Star Trek App)
It was determined that a volcano on the world was going to erupt and cause the extinction of the planet's species, notably the Nibirans. The Enterprise crew enacted a Prime Directive-defying plan to save the people by stopping the eruption with a cold fusion device. In doing so, the natives became aware of the ship and crew. This eventually led to Admiral Christopher Pike chewing out Captain James T. Kirk and Spock, while regaining control of the vessel with Kirk becoming his first officer. (TOS movie & novelization: Star Trek Into Darkness)
- This may be the same planet as Nibiru III.
|planets visited by the USS Enterprise (Kelvin timeline)|
|Earth • Vulcan • Delta Vega (Vulcan system) • Saturn • Titan • Delta Vega (Delta Vega sector) • Taurus II • Makus III • Deneva • Gamma Trianguli VI • Beta III • New Vulcan • Phaedus • Nibiru • uninhabited planetoid • Parthenon 559 • Khitomer|