Asteroid shock: Scientists’ urgent warning after surprise rock’s close shave with Earth

2006 QQ23, another asteroid, is set to pass by our planet on Saturday.

It is twice the size of The Shard.

NASA says there is no danger of a collision but its size means that whilst it is is expected to be no closer than 4.6 million miles, it is classed as “potentially hazardous”.

If it hits land, it might obliterate an entire city.

READ MORE: Asteroid shock: Scientists discover mysterious rock spinning to pieces