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China's Jade Rabbit moon rover was crippled by a rock, experts reveal

The Chinese lunar rover likely became crippled after hitting a rock while it navigated difficult terrain, according to a senior mainland scientist involved in the investigation into the breakdown.

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The Chinese lunar rover likely became crippled after hitting a rock while it navigated difficult terrain.
Stephen Chenin Beijing

The Chinese lunar rover likely became crippled after hitting a rock while it navigated difficult terrain, according to a senior mainland scientist involved in the investigation into the breakdown.

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Zhang Yuhua, deputy chief designer of Yutu or "Jade Rabbit", said the area where the rover landed was more challenging than expected, Xinhua reported.

The distribution of rocks made the area look "almost like a quarry", with at least four rocks at least 20cm high every 100 square metres, Zhang was quoted as saying. The six-wheel rover suffered a "mechanical abnormality" in January, about a month into its planned three-month mission.

Jade Rabbit, also known as Yutu, landed on the moon on December 14 - the first "soft landing" on the lunar surface since 1976. It first broke down on January 25.

Hopes were briefly raised when the lunar rover responded to controllers' commands - albeit with delays and difficulty - but it is currently incapable of activating its wheels or solar panels.

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The breakdown had earlier been tied to the moon's low temperature, which caused a blockage in the power circuitry, preventing the driving mechanism from powering up. 

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