If NASA is hiding the existence of Nibiru, they are exerting immense funding to keep non-governmental individuals and organizations from publishing any findings regarding the ever-illusive "Nibiru." It is much more likely that mainstream science, and all the evidence that mainstream science gathers and publishes, is correct, and there is no object in need of being called 'Nibiru.' The effort by one organization of keeping every astronomer, or ever individual with a telescope, quiet about discovering a massive apocalyptic object would be extraordinary. There is, in fact, a simple test for this question that one can perform: either purchase or rent a telescope, or make use of a public telescope, and look for 'Nibiru' yourself. If you find anything remotely like one of the cults that purport its existence describe, either consult a professional, or consult a starchart, and find out what it is. If you are unable to find Nibiru, you may conclude that the highly reputable scientists of our day and age are not part of a conspiracy-coverup, and Nibiru is, in fact, a myth, and is not being hidden from anyone by anyone.
nibiru does not exist.
It isn't. The "evidence" of Nibiru consists of nothing but hoxes and delusions. Nibiru does not exist.
It's a hoax. The idiot who came up with it is closer to an astrologer than astronomer.
it does not exist.
No, Nibiru is a fictitious planet-like object associated with apocalypse mythology. Myths have no capacity to hurt anyone.
It makes for interesting reading, but there are no aliens.
No. Nibiru does not exist.
None, because Nibiru doesn't exist. Those that support the Nibiru myth, and believe Nibiru to be a large terrestrial planet (there are many different beliefs among Nibiru believers as to what Nibiru actually is), often claim that it has 18 visible moons.
No. Nibiru does not exist.
Never. Nibiru doesn't exist.
Neh-bah-roo Nibiru
Since Nibiru does not exist, you don't have to do anything.