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3-2-1:从数字上看美国宇航局的木星任务

这张由美国宇航局和加州理工学院提供的艺术家渲染图展示了木星上方的朱诺号宇宙飞船。在从地球发射5年后,“朱诺”号计划于2016年7月4日星期一进入这个气态巨星的轨道。美联社

美国洛杉矶——自2011年发射以来,美国宇航局的“朱诺”号宇宙飞船一直在向太阳系中最大的行星飞行。周一,“朱诺号”计划进行一次紧张的行动,进入木星轨道,探索其被云层覆盖的大气层和内部构造。

解读:NASA的飞船驶向木星,“行星上的类固醇”的广告

以下是有关这项耗资11亿美元任务的几个关键数字:

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这就是从发射到到达的总距离。朱诺的旅程不是一帆风顺的。由于运载“朱诺”号的火箭不够强大,无法直接将其送入木星,所以它需要走更长的路线。它绕着内太阳系旋转,然后被地球甩来甩去,利用地球作为引力弹弓冲向外太阳系。

- 3100英里

这就是“朱诺号”离木星云顶的距离。在执行任务期间,它将在避开最强烈辐射的路径上飞越两极37次。

- 48分19秒

这就是从木星发出的无线电信号到达地球所需的时间。在这次遭遇中,“朱诺”号将启动主引擎大约半个小时来减速。当地面控制人员收到它启动的消息时,引擎已经燃烧完毕,如果一切按计划进行,“朱诺号”将进入轨道。

- 20个月

这就是任务将持续的时间。由于“朱诺号”处于恶劣的辐射环境中,其精密的电子设备被安置在一个特殊的钛储藏室中。最终,“朱诺号”将会屈服于强烈的辐射,并被命令进入木星的大气层,以避免与木星的卫星发生碰撞

——9

“朱诺号”携带了一套九种仪器,从木星内部到大气层进行探索。它将绘制木星的重力场和磁场图,并追踪大气中有多少水。它的彩色相机名为JunoCam,将拍摄木星旋转的云层、极地地区以及闪烁的南北极光的特写镜头。

——三

“朱诺号”上延伸了三个巨大的太阳能机翼,使其成为距离最远的太阳能航天器。这些面板可以产生500瓦的电力,足以驱动这些仪器。

___

在线:

任务页面:http://tinyurl.com/Jupitermission。

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点击下面的链接,阅读欧洲俱乐部冰球比赛的一般历史。

CHL历史:从哪里开始
CHL历史:过去的欧洲俱乐部锦标赛

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