中國網(wǎng)站品牌欄目（頻道）
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A bird soars in front of a half moon near Glencoe, Ky., Monday, Aug. 16, 2010.(Agencies) |
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The Man in the Moon has become the latest victim of contraction in the housing market. Astronomers reporting on Thursday in the US journal Science said they had found previous undetected landforms which indicate that Earth's satellite has been shrinking... albeit by only a tiny amount. The intriguing features, called lobate scarps, are faults created when the Moon's once-molten interior began to cool, causing the lunar surface to contract and then crinkle, they said. Relative to the Moon's age, estimated at around 4.5 billion years, the contraction is recent, occurring less than a billion years ago, and is measured at about 100 meters (325 feet). Lobate scarps were first spotted near the lunar equator in the 1970s by panoramic cameras aboard the Apollo 15, 16 and 17 missions. Fourteen new faults have been been spotted in high-resolution images taken by NASA's Lunar Reconnaissance Orbiter. The new discoveries show that the scarps are globally distributed and not clustered in equatorial regions, and this provides powerful evidence for the contraction scenario. The investigation was headed by Thomas Watters of the Center for Earth and Planetary Studies at the Smithsonian Museum's National Air and Space Museum, Washington. (Read by Nelly Min. Nelly Min is a journalist at the China Daily Web site.) (Agencies) |
“月球人”成為月球“房地產(chǎn)市場”緊縮的最新受害者。 天文學家于上周四在美國《科學》雜志發(fā)表的報告中稱，他們發(fā)現(xiàn)了月球上出現(xiàn)了一些之前未被勘測到的地貌，這些地貌表明地球的這顆衛(wèi)星正在縮小——盡管幅度很小。 這些被稱為“葉狀陡坡”的有趣的地貌特征是在月球一度熔化的內(nèi)核開始冷卻的過程中形成的斷層，這一過程使得月球表面發(fā)生收縮，并出現(xiàn)褶皺。 這一收縮過程是在“近期”發(fā)生的，相對于月球45億年的高齡，這個“近期”指的是不到10億年前。但據(jù)測算這一收縮的幅度僅為約100米（325英尺）。 “葉狀陡坡”于上世紀70年代在月球赤道附近首次被發(fā)現(xiàn)，是阿波羅15號、16號、17號飛船上的全景照相機拍到的。 之后又有14處新的斷層被發(fā)現(xiàn)，美國宇航局的月球勘測軌道飛行器拍攝了這些斷層的高清照片。 這些新發(fā)現(xiàn)表明，葉狀陡坡分布在月球各地，并非只是集中在月球的赤道地區(qū)，這也為月球正在縮小這一假設(shè)提供了有力證據(jù)。 這項研究由華盛頓史密森國家航空航天博物館地球與行星研究中心的托馬斯沃特斯負責開展。 相關(guān)閱讀 （中國日報網(wǎng)英語點津 Julie 編輯蔡姍姍） |
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Vocabulary: fault: a break in the continuity of a body of rock or of a vein, with dislocation along the plane of the fracture（斷層） panoramic: bird's-eye, as from an altitude or distance（全景的） high-resolution: having or capable of producing an image characterized by fine detail（高分辨率的） |
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