Nasa has given an update on hidden Planet X, AKA Nibiru and has given a stark warning about what will happen when it strikes Earth tomorrow.
Nothing.
Author David Meade says it’s going to wipe out the entire planet because of a passage in the Bible – Revelation 12:1.

The passage says: ‘A great sign appeared in heaven; a woman clothed with the sun with the moon under her feet and a crown of 12 stars on her head.
‘And being with child, she cried out in her travail and was in anguish of delivery.’
However, Nasa has now poured water on the rumours.
The space agency said: ‘Various people are “predicting” that the world will end Sept. 23 when another planet collides with Earth.

‘The planet in question, Niburu [sic], doesn’t exist, so there will be no collision.’
They gave a Q&A about Nibiru in 2012 answering ‘why the world didn’t end’. If you change the dates 2017 and September 23, it becomes clear
Are there any threats to the Earth in 2012? Many Internet websites say the world will end in December 2012.
The world will not end in 2012. Our planet has been getting along just fine for more than 4 billion years, and credible scientists worldwide know of no threat associated with 2012.
What is the origin of the prediction that the world will end in 2012?
The story started with claims that Nibiru, a supposed planet discovered by the Sumerians, is headed toward Earth.
This catastrophe was initially predicted for May 2003, but when nothing happened the doomsday date was moved forward to December 2012 and linked to the end of one of the cycles in the ancient Mayan calendar at the winter solstice in 2012 – hence the predicted doomsday date of December 21, 2012.
http://metro.co.uk/2017/09/22/nasa-reveals-what-will-happen-when-planet-x-nibiru-hits-earth-on-september-23-6947185/

Nibiru doesn't exist and nothing will happen on 23rd September

Its 24th of September, am I typing from the other side?

All these predictions keep failing.