A strange light filmed in the sky over Auckland on Saturday night was probably not a UFO, comet, or rogue planet about to smash into Earth, astronomers say.
The descending point of light, which revealed a U-shaped nimbus when zoomed in on, was filmed in the sky west of Auckland about 6pm on Saturday.
The video was uploaded to YouTube by a user known as biggordy100 who narrates that the light is "back", indicating he has seen it in the past.
The tag-line on the video reads: "WTF is in our skies? ufo! nibiru? elenin? spaceship? comet? seen over Auckland at 18.00
Nibiru is the name given by Doomsday and conspiracy blogs and websites to a supposed collision between Earth and a mystery planet - Planet X - that is supposed to occur in the early 21st Century.
According to Wikipedia, Nibiru was revealed to Wisconsin woman Nancy Lieder after aliens implanted a communications device in her brain.
Astronomers who could be bothered have debunked both theories.
He said the light that had been filmed was "almost certainly the contrails of a plane heading out over the Tasman Sea".
Its spreading contrail was catching the light and making the effect recorded.
"Look at the coverage over Hurricane Irene - if there was something out there that was going to hurt us, we would know about it.''