BrainKing - 讨论板 (Politics)

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Politics

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6. 八月 2012, 00:13:47

Mort

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In the next few hours Nasa will attempt to land its one-tonne Curiosity rover on the Red Planet to study the possibility that this world may once have hosted microbial life.

The vehicle is packed with scientific instruments, including a laser that can zap rocks to determine their make-up. Curiosity is currently hurtling through space, close to the end of a 570 million km journey from Earth.

Engineers describe its trajectory as near-perfect and they have passed up the last two opportunities to make course corrections. The rover, tucked inside a protective shell, is due to begin its descent to the surface at 05:24 GMT, Monday (06:24 BST; 22:24 PDT, Sun).

A signal confirming it has landed inside a deep depression known as Gale Crater is expected on Earth about seven minutes later, at 05:31 GMT.

But getting this audacious exploration project safely down will be a colossal challenge. Two-thirds of all missions sent to the Red Planet have failed, a good many lost on entry into the thin but unforgiving Martian atmosphere.

>>>>>>>fingers crossed!!