Huge asteroid passes close to Earth
An asteroid has passed close to Earth say scientists, and it could be as big as a ten-storey building.
It is known as 2009, DD45, and could be as big as 21-47 meters across.
The gap was just 72,000 km (44,750 miles); a fifth of the distance between our planet and the Moon.
It is in the same size range as a rock which exploded over Siberia in 1908 with the force of 1,000 atomic bombs.
This asteroid has passed by our planet before, and was sighted again on Saturday in Australia.
Let's hope this one doesn't explode.
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Sunnyvale, California, United States