Earth will witness 5 'close' asteroid flybys today: NASA
US space agency NASA has reported that the earth will witness as many as five 'close' asteroid flybys today. The asteroids range from as big as three to six school buses to the size of the Eiffel tower, NASA revealed. They will safely fly past the earth at speeds ranging from 6.52 km/s to 16.69 km/s. 