Big space rock to streak past Earth on Wednesday

An asteroid stretching 650 metres (2,000 feet) across is on track to whoosh past Earth on Wednesday at a safe -- but uncomfortably close -- distance, according to astronomers."Although there is no possibility for the asteroid to collide with our planet, this will be a very close approach for an asteroid this size," NASA's Jet Propulsion Laboratory said in a statement.Dubbed 2014-JO25, the asteroid will come within 1.8 million kilometres (1.1 million miles) of Earth, less than five times the dist