An asteroid will shoot past Earth closer than the moon this morning, Nasa says.
But there is no risk of an Armageddon situation - scientists say the space rock, known as 2014 DX110, will "safely pass".
At 10am, the 30-metre asteroid will reach its closest approach, about 350,000 kilometers away.
The average distance between Earth and the moon is 385,000km.
Nasa said such events happen about 20 times a year. Its Spaceguard detection programme identifies these objects, and determines if any could be potentially hazardous.
Astronomers at the Auckland Stardome Observatory and Planetarium said the asteroid would not be visible from New Zealand and it would not be a significant event.
What will be the main motivation for humanity's future space endeavours?Related story: (See story)
The cost of losing nature