Largest asteroid ever tracked zooms past Earth
A 4.4-km-wide asteroid named 'Florence' passed safely by Earth on Friday at a distance of about 70 lakh km (nearly 18 Earth-Moon distances), becoming the largest asteroid to pass by this close since NASA began tracking near-Earth asteroids. The fly by is the closest by Florence since 1890 while the next close encounter will not be until 2500, said NASA.