“世纪彗星”将直面太阳 难对地球产生撞击威胁

阿拉老李

 中国网11月29日讯 据俄罗斯《共青团真理报》网站11月28日报道，“世纪彗星”将在几小时内与太阳“碰面”。
天文学家们很好奇，这场盛大的“太空秀”会带来怎样的影响。
最壮观的世纪彗星-ISON正在靠近太阳，距离它们“碰面”只剩下几个小时了。正如预期的那样，彗星会在莫斯科时间11月28日，星期四在22.45mck达到与太阳最近的距离。
这场即将到来的“会面”会成为近期以来最为壮观的“太空秀”。很多天文学家认为，彗星ISON会因不能承受太阳强大的引力和近3000度的高温而灭亡。据专家估计，彗星存活的几率只有30%-40%。
目前，该彗星的亮度相当于天空中最明亮的星星-天狼星。不过只能在天文观测台上才能看到这颗独特的星星，因为它现在距离太阳非常近，已经被隐没在了太阳的光芒中。
彗星C/2012 S1(ISON)于2012年9月是由俄罗斯天文爱好者阿尔乔姆 诺维诺奇克和他来自白俄罗斯的同事维塔利 涅夫斯基在离基斯洛沃茨克不远处的天文观测台上用望远镜发现的。
另外，如果这一次彗星ISON能够幸免于难存活下来，就会在2013年12月26日来到地球身边。到时候它和地球的距离会是6000万公里，还不到我们与太阳距离的一半，不过对于避免地球和它直接碰撞，这个距离也已经足够了。但是如果彗星在这次与太阳的“会面”没能幸免于难，那地球也就不会有任何被撞击的担忧了。就像科学家们说的，130年前星体的残骸也没有摧毁地球。（实习编译：曾宪法）
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