With the cancellation of Nasa's Constellation programme to return Americans to the moon by 2020, who is to inspire the next generation to finish it?

随着美国宇航局计划2020年重返月球的“星座计划”取消，还会由谁来推动下一代人完成这一计划呢？

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President Obama is expected to announce what he intends to do about the Constellation programme in October.

BBC: Test ignition for 'Moon rocket'

Whether Nasa could maintain this schedule even if President Obama endorses the Constellation programme is open to question, however.

BBC: Spaceship passes critical review

Those could range from continuing to fly the space shuttle to moving forward with the Constellation programme without any changes, he said.

BBC: Nasa defends its spaceflight plan