But it wasn't all that long ago that the best minds in the world thought a journey to the moon was utterly impossible.

不过就在不久之前，不少世界上最聪明的人还认为登月不可能实现呢。

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Scientists have taken their first, vicarious journey to the center of the moon, thanks to a fresh look at 30-year-old moonquake data from the Apollo era.

科学家们由于重新审视了从阿波罗时代就开始已有30年历史的月震数据，才能使他们取得了第一次到月亮中心的替代旅行。

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"It's a historic moment, as far as India is concerned... we have started our journey to the Moon and the first leg of the journey has gone perfectly well," said Nair.

他说：“对印度来说，这是历史性的一刻。”我们已经开始月球之旅，而旅程的第一步骤走得都很完美。

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But Mr Aldrin disagreed with the view that astronauts should test capabilities for a long-duration flight on the Moon before attempting a journey to Mars.

BBC: Moon astronauts urge Mars mission

"We're better prepared for a journey to Mars now than we were when we sent men to the moon in the 1960s, " Zubrin told CNN.

CNN: Life on Mars?