On 1 September, a mammoth 4.4 kilometre (2.7 mile) chunk of rock will pass close by Earth causing no threat to the earth.
It is the largest near-Earth object at 18 times the distance between Earth and the Moon .
The asteroid Florence Nightingale isn’t expected to come any closer than 7 million kilometres (4.4 million miles).Florence will be visible to small telescopes for a few nights from late August to early September.
Currently 1,825 potentially hazardous near-Earth objects being tracked by NASA. According to scientists , Earth is safe for more than 500 years from now.