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(单词翻译)
In 1970, the Soviet1 Union put a laser reflector on the moon, carried by a rover. A few months later, it disappeared. Some speculated that the rover had fallen into a crater2 or parked in such a way as to render the reflector inaccessible3. Now after 40 years on the lunar surface, the reflector has been found.
A team at U.C. San Diego has been searching for it. Earlier this year, NASA’(National Aeronautics4 and Space Administration)lunar reconnaissance orbiter camera provided images of the regional landing area. A sunlit speck5 miles from where the team was looking, turned out to be the rover and reflector. The San Diego team was quickly able to pinpoint6 the reflector's location to within 10 meters. Scientists send laser pulses to the moon and measured signals that bounce back from three reflectors left by Apollo astronauts, along with another Soviet one. This information helps track the moon's position and orbit. And the researchers say that the rediscovered Russian reflector is particularly useful for studying in the moon liquid core and testing ideas about gravity. Says team leader Tom Murphy of the reflector, “It’s got a lot to say after almost 40 years of silence."
1 Soviet | |
adj.苏联的,苏维埃的;n.苏维埃 | |
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2 crater | |
n.火山口,弹坑 | |
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3 inaccessible | |
adj.达不到的,难接近的 | |
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4 aeronautics | |
n.航空术,航空学 | |
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5 speck | |
n.微粒,小污点,小斑点 | |
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6 pinpoint | |
vt.准确地确定;用针标出…的精确位置 | |
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