在人类的天文历史上,月球一直占据着重要的地位。但是大家还是觉得登月的步伐太慢了,人类渴望能够尽快的窥见月球的全部,虽然这个愿望一直被大家的努力慢慢实现,但是为什么现在我们做不到呢?
Every schoolchild knows that the small step for man and the giant leap for mankind are words uttered by Neil Armstrong during the 1969 Apollo 11 Moon landing. But now the famously reclusive astronaut has made a rare foray into the public arena to give an answer to a puzzling question: having gone all that way at such vast expense, why were the steps and leaps so few?
The subject arose when science blogger Robert Krulwich mused on his National Public Radio page about why Armstrong and crewmate Buzz Aldrin had covered an area barely larger than a football pitch. The trip was a leap to be sure, a fantastic accomplishment, he wrote. But the first Moon explorers explored an astonishingly small area. There it might have rested.
But much to Krulwichs surprise, he got an answer and from the commander himself. In an emailed response, Armstrong, who at 80 is still campaigning to have Nasa resume its exploration of the lunar surface, said there were multiple reasons for the small footprint of that first landing, not least among them nervousness about how well their water-cooled suits would work.
We were operating in a near perfect vacuum with the temperature well above 200 degrees fahrenheit with the local gravity only one-sixth that of Earth, he explained. That combination cannot be duplicated here on Earth. We did not have any data to tell us how long the small water tank in our backpacks would suffice.
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