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夸父逐日不是梦?美国将开启首次探日任务

2017-06-02 10:43:52   新华社

(原标题:夸父逐日不是梦?美国将开启首次探日任务)

美国航天局5月31日宣布,将于2018年夏天正式开始首次探日任务。

据美国有线电视新闻网报道,执行此次太空探索任务的将是一个约3米高的无人探测器。5月31日,该探测器被命名为“帕克太阳探测器”,以向美国天体物理学家尤金·帕克致敬。

据了解,这是美国航天局首次用在世人士的名字命名航天器。

帕克1958年发表的科研论文预测了太阳风的存在,他的理论随后得到卫星观测确认。

太阳风是从太阳向外流动的带电气体流,通常以160万公里的时速经过地球,会扰乱外太空天气,从而进一步影响地球,如卫星、宇航员以及电网系统和飞机航班的受辐射程度等。

为向帕克表达敬意,“帕克太阳探测器”将携帕克本人的照片和他那篇论文一起飞向太阳,同时,帕克还会托探测器捎去他给太阳的一句话,这句留言将刻在一个纪念盘上。

报道称,这是美国航天局首次探索太阳和日冕。“帕克太阳探测器”将逐渐靠近太阳,在距太阳表面600万公里处绕日飞行,其间它获得的观测数据有望帮助人们更好了解恒星、日冕变化和太阳风,并改进对重大外太空天气事件的预报。

为抵达预定轨道,“帕克太阳探测器”会首先绕金星飞越7次,在近7年时间内逐渐靠近太阳,最终它所处位置将比水星距太阳更近。届时它将以72万公里时速、即每秒200公里的速度绕日飞行。

为抵御超过1300摄氏度的高温,“帕克太阳探测器”表面有约11厘米厚的碳复合材料。

这次探日任务预计于2025年6月结束。(海洋)【新华社微特稿】

责任编辑:杨晓晨 CN067
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