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“卡西尼”土星探测飞船:地球,请不要为我哭泣

2017-09-16 21:16:45   新华网

新华社洛杉矶9月15日电 题:“卡西尼”土星探测飞船:地球,请不要为我哭泣

新华社记者郭爽

15日是个普通的日子。即使你们仰望天空,恐怕也无从感知遥远的土星云端发生的惊心动魄:我,“卡西尼”土星探测飞船,即将耗尽燃料,正以每小时超过11万公里的速度,冲入土星大气。

高热让我开始剧烈抖动,我拼尽全力,想尽可能告诉你们更多关于土星系的奥秘和传奇。我努力将手臂指向你们所在的方向,传输着最后的数据,直至粉身碎骨、灰飞烟灭。

就在确认我已终结20年太空之旅的那个瞬间,美国航天局下属的喷气推进实验室里的探测项目主管流下眼泪,就要解散的项目团队相拥告别,就连互联网上的人们也在伤感惋惜。

你们都在说:永别了,“卡西尼”。

与地球的遥远距离,让你们在80多分钟后的美国东部时间15日7时55分(北京时间15日19时55分)才得以听到我最后的声音。穿越时空的无线电信号,在时空中长久回响。说再见,并不容易。

我一遍遍地告诉地球:请不要为我哭泣。如同流星划过天际,在13年的土星系探测之后,现在,我已与其融为一体。

1997年10月15日,我从美国佛罗里达州卡纳维拉尔角升空。前进道路曲折坎坷。在太阳系最初7年的旅程中,不少天体曾给予我帮助。我造访过的金星、地球、月球、小行星和木星,都曾用自己的引力助我一臂之力,让我最终于2004年抵达土星轨道。

定居土星系的13年间,我曾发现土卫二存在全球性海洋,探测到这颗卫星具备生命存在所需要的几乎所有条件;我也曾127次飞掠土卫六,探测到这颗卫星存在的液态甲烷环境,感觉它有点像我的家乡……

我的告别演出开启于今年4月。从那时起,我连续22次在土星和土星环之间穿越。在最后一次椭圆形轨道旅行中,我冲向土星,并直接在土星大气中取样,尝试帮助人类揭开行星形成和进化之谜。项目团队说,这些都是前所未有的创举。

美国航天局副局长托马斯·楚比兴在一份声明中赞扬我说,近20年间,“卡西尼”探测任务大幅刷新了人类对土星、环境和生命的认识。

与土星相伴的13年间,我曾发给你们大量数据资料,仅图像就差不多40万张。科学家依据这些信息,已发表了约4000篇科学论文。美国航天局还依据这些信息设计了前往木卫二的探测计划,以及未来十年间的其他太空探测项目。

不过,这并不是我的全部贡献。正如项目科学家琳达·施皮尔克所说,“‘卡西尼’的馈赠将让我们受益多年。它穷尽一生发回的大量数据,我们今天仅知皮毛。”

中国行星科学家崔峻从2006年就开始参与研究我的项目。他恋恋不舍地说:“我和我的学生们现在手里还有多篇基于‘卡西尼’数据的论文正在修改,我相信在未来的10年甚至20年,这个过程会一直持续下去——项目可以结束,科学永无止境。”

事实上,我是个典型的国际合作项目。过去20年间,有十几个国家参与任务,密切分工合作。正如崔峻所说,这是国际深空探测发展的必然趋势,科学没有国界。

永别了,美丽的土星。永别了,美丽的地球。我止步于此,但人类不会。有一天,你们终将再次与我相见,从我的身边,前往那些我未曾涉足的远方。

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