He said a Planet X will collide with the Earth leading to the world's end.
Astronomer says nothing special about 23 September
Astronomer Christopher M. Graney said that there was nothing unusual about the celestial arrangement reflecting predictions from the Bible's Book of Revelation He said: "In the past 1,000 years, this same event has happened at least four times already, in 1827, 1483, 1293, and 1056".
5 times the world was supposed to end, but didn't
6 September 1994- Harold Camping said Christ would return and the world will end.
Y2K- This theory alleged that the world would end on 1 January 2000.
5 May 2000- Richard Noone said planets would align and the world would end.
10 September 2008- Switching on of the Large Hadron Collider was predicted to recreate Big Bang Theory.
21 December 2012- Mayan predicted doomsday.
23 Sep 2017
NASA denies the existence of Nibiru or Planet X
NASA addressed the issue and said that all predictions about the world ending on 23 September 2017 were false.
NASA said, "Nibiru, doesn't exist, so there will be no collision".
Further, the agency said if this had any truth then the astronomers would be tracking it since decades.
Moreover, NASA contended it would've been visible to the naked eye by now.