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美国上演百年一遇日全食全民疯狂:护目镜卖到脱销

2017-08-22 07:35:42   中国青年网

3万人在俄勒冈州一处最佳观测地点安营扎寨

当月球运行到太阳与地球之间,太阳被完全遮蔽,本来明亮的天空一下子变得漆黑……这种壮观又罕见的天文现象就是日全食。

美国西部时间21日上午(北京时间22日凌晨),一场盛大的日全食在美国上演。这不仅是今年全球唯一一次日全食,也是时隔99年日全食再次跨越美国。美国民众已经为此疯狂。

陆上区域只经过美国

此次日全食的“全食带”,西起东北太平洋,最后在大西洋中部结束,陆上区域只经过美国这一个国家。这是自美国1776年建国以来,第一个仅在美国境内掠过、而没有经过其他国家的日全食。

这也是时隔99年,日全食再次“穿越”美国。此次共有14个州能见证这场百年一遇的天文奇观。由于日全食运行轨迹是从西至东运行的,所以,位于美国西北部太平洋沿岸的俄勒冈州是第一个看到此次日全食的地方,更具体的位置在该州的林肯海滩,日偏食出现在当地时间早上9时5分,日全食则出现在上午10时16分。

最后一个则是位于东南部大西洋沿岸的南卡罗来纳州。最后的日全食将出现在该州的查尔斯顿,出现时间为当地时间下午2时48分。不过,之后还可以看到日偏食。下午4时9分,日食将彻底离开美国。

“最长见食点”则位于中东部的伊利诺伊州,在那里,可以观测到时长2分40秒的日全食。

有人因交通事故丧命

这次日全食已让美国全民疯狂。

虽然美国宇航局将对此次日全食进行直播,不过相当数量的美国人不满足于看屏幕,而是希望能亲身经历这一动人心魄的罕见天象。

统计数字显示,全美有1200万人住在“日全食带”,而距离“日全食带”一天车程的人口则约有2亿。有差不多700万人将涌进“全食带”地区的城镇,观测这一罕见天象。

位于俄勒冈州中心区域的26 号和96 号高速公路从16日起就开始出现严重拥堵,因为这些地方是靠近日全食的最佳观赏区域。

通往爱达荷州锯齿山脉的道路也在几天前就出现拥堵。森林管理员估计,会有3万人涌进锯齿山脉,他们已为8个观赏日食地点除草,确保能安全停车。

作为日全食最后光临的一个州,南卡罗来纳州也是观赏日全食的热门目的地之一。据估计,该州将迎来60万至200万人观赏大潮,该州公路巡警计划增设160名巡警以应付车潮与人潮。

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