Asteroid 7-times size of Big Ben to pass Earth - NASA tracks 'potentially hazardous' rock
Asteroid news: The space rock will make a so-called 'close approach' (Image: EXPRESS) READ MORE And though there is no risk of impact from RM45, its size and speed paint a bleak picture of what else could be lurking in the depths of space. Only last year did a 4.1km-wide rock coast past our planet and a 10km-wide asteroid is believed to have wiped out the dinosaurs 65 million years ago. Asteroid RM45 is estimated to measure somewhere between 310m and 680m across. At the upper end of the estimate, the space rock is more than seven times as tall as Big Ben's clocktower in Westminster, London.
Source: express.co.uk