Spacecraft converge on Mars.
The mystery of whether there is or has been life on Mars may be clarified or even resolved soon, with four new spacecraft-two from the European Space Agency and two from NASA-arriving at the planet. They join two NASA probes already in orbit, though one of them-Odyssey-had a radiation sensor knocked...
| 发表在: | IEEE spectrum 41, 10(duplicate) (2005). |
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| 格式: | 文件 |
| 语言: | English |
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