15日中国出现“超长版”日环食 号称千年最长
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日环食 (资料图片)
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日环食原理图 商报图形 苏小鸥 制
持续时间可能长达11分钟 打破此纪录可能要等到3043年
据东方网消息
15日下午15时31分左右,日环食将上演天际,太阳被“咬”瞬间将被定格长达11分钟,号称千年最长日环食。重庆地区在环食带内,市民将能看到日环食。
日环食是日食的一种,发生日环食时,太阳的中心部分黑暗,边缘却仍然明亮,在天空中形成一个耀眼的光环,蔚为壮观。形成原因是由于月球处于太阳和地球之间,遮挡太阳光所致,但是月球距地球较远,不能完全遮住太阳,就形成了日环食。
这是本世纪首次在我国出现的日环食,而上一次我国发生日环食天象还是在1987年9月23日。“超长版”日环食持续时间最长可达11分08秒,要想打破此次纪录,可能得等到3043年了。
据介绍,环食带平均宽达300千米,从非洲中部开始,经印度洋、印度南部、缅甸等国家最后进入我国,途经云南、四川、贵州、重庆、湖北、河南、江苏、山东等省市部分区域。
专家提醒,日偏食时太阳被月球挡住了一部分,但周边还是散发出强光,不能用肉眼直接观看,以免对眼睛造成损伤。
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