Opportunity has scrambled out of the 800m-wide Victoria crater and is now setting off on a journey of more than a kilometre to a giant crater called Endeavour.

“机遇号”最近爬出了宽达800米“维多利亚”弹坑，目前正在奔赴一千米以外的“恩达瓦”弹坑。

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Astronomers calculated recently that there are nearly 1, 000 asteroids at least a kilometre (0.6 miles) wide which cross the Earth's path.

BBC: You are in: Sci/Tech