The Hayabusa 2 mission was launched in December 2014 and took three-and-a-half years to arrive at Ryugu, 280 million km from Earth. On September 21, the unmanned spacecraft lowered the two rovers about 60 metres on the asteroid’s surface. Called Rover 1A and Rover 1B and weighing a kilogram each, they resemble round biscuit tins and have since beamed back high-resolution images from the ragged Ryugu surface, said the space agency
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