NASA is tracking an enormous asteroid which could be as big as the world's tallest building, the Burj Khalifa in Dubai.Asteroid 153201 (2000 WO107) has the potential to reach similar heights and could be every bit as tall as the famous skyscraper, which pierces the sky at a staggering 829.8 metres high.The building, found in the United Arab Emirates city has been the world' tallest since 2009, when it took the title from the Taipei 101 in Taiwan.Now, Nasa's Center for Near Earth Object Studies is tracking the rock, which is estimated to fly by Earth on November 29.The giant asteroid is expected to be anywhere between 370m and 820m, which is the equivalent of 1,213 and 2,690 feet.NASA predicts the asteroid to be travelling at 56,000 miles.
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