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Europe's first spacecraft to the moon ended its three-year mission Sunday by crashing into the lunar surface in a volcanic plain called the Lake of Excellence, to a round of applause in the mission control room in Germany. Hitting at 2 kilometers per second, the impact of the SMART-1 spacecraft was expected to leave a 3-meter-by-10-meter crater and send dust kilometers above the surface. Observatories watched the event from Earth and scientists hoped the cloud of dust and debris would provide clues to the geological composition of the site. "That's it -- we are in the Lake of Excellence," said spacecraft operations chief Octavio Camino as applause broke out in mission control in Darmstadt, Germany. "We have landed." Minutes later, officials showed off a picture captured by an observatory in Hawaii displaying a bright flash from the impact. Launched into Earth's orbit by an Ariane-5 booster rocket from Kourou, French Guiana, in September 2003, SMART-1 used its ion engine to slowly raise its orbit over 14 months until the moon's gravity grabbed it. The engine, which uses electricity from the craft's solar panels to produce a stream of charged particles called ions, generates only small amounts of thrust but only needed 80 kilograms of xenon fuel. The craft's X-ray and infrared spectrometers have gathered information about the moon's geology that scientists hope will advance their knowledge about how the moon's surface evolved and test theories about how the moon came into being. The spacecraft has also been taking high-resolution pictures of the surface with a miniaturized camera. |
周日,歐洲首架探月航空器結束了三年探月之旅,成功擊中月球表麵的“卓越湖”火山平原,此消息讓德國的地麵控製大廳裏爆發出熱烈的掌聲。 這架名為"智能1號"的探測飛船的撞月速度為每秒2公裏。按照此速度,這次撞擊預計會在月球表麵留下一個直徑3米,深10米的坑,而且會在月麵激起幾公裏高的塵埃。 很多觀測站在地表觀測了撞擊全過程,科學家希望撞擊所激起的塵雲和碎石能為研究“卓越湖”區域的地質構成提供依據。 位於德國達姆施塔特的控製中心爆發出熱烈掌聲,探測器地麵指揮所負責人奧克塔唯奧·卡米諾說:“成功了!我們撞上了卓越湖區!我們著陸了!” 幾分鍾過後,地麵指揮所的官員公布了一張位於夏威夷的某觀測站拍攝到的“撞擊亮光”照片。 2003年9月,“智能1號”探測器從法國圭亞那地區的庫魯基地由Ariane五號火箭發射升空,在其離子引擎的推進下,“智能1號”緩慢脫離運行軌道,在14個月後進入月球重力場。 離(li)子(zi)引(yin)擎(qing)將(jiang)航(hang)天(tian)器(qi)太(tai)陽(yang)能(neng)麵(mian)板(ban)所(suo)采(cai)集(ji)的(de)太(tai)陽(yang)能(neng)轉(zhuan)化(hua)為(wei)電(dian)能(neng),再(zai)生(sheng)成(cheng)帶(dai)電(dian)的(de)離(li)子(zi)流(liu)。太(tai)陽(yang)能(neng)離(li)子(zi)引(yin)擎(qing)所(suo)產(chan)生(sheng)的(de)推(tui)動(dong)力(li)並(bing)不(bu)大(da),但(dan)所(suo)需(xu)要(yao)的(de)氙(xian)氣(qi)燃(ran)料(liao)也(ye)很(hen)少(shao),隻(zhi)有(you)80千克。 “智能1號”的X光(guang)和(he)紅(hong)外(wai)線(xian)分(fen)光(guang)儀(yi)采(cai)集(ji)了(le)關(guan)於(yu)月(yue)球(qiu)地(di)質(zhi)的(de)很(hen)多(duo)信(xin)息(xi),科(ke)學(xue)家(jia)們(men)希(xi)望(wang)這(zhe)些(xie)信(xin)息(xi)能(neng)夠(gou)豐(feng)富(fu)他(ta)們(men)有(you)關(guan)月(yue)麵(mian)進(jin)化(hua)的(de)知(zhi)識(shi),並(bing)能(neng)為(wei)檢(jian)驗(yan)月(yue)球(qiu)形(xing)成(cheng)的(de)各(ge)種(zhong)理(li)論(lun)提(ti)供(gong)依(yi)據(ju)。 “智能1號”上還裝有一個微型照相機,它拍攝了很多高清晰的月麵照片。 |
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