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        一小行星將與地球“擦肩而過” 專家稱撞擊概率極低

        2019年06月10日 16:49 來源:中國新聞網 參與互動 

          中新網6月10日電 據外媒10日報道,2019年9月9日,一顆有足球場大小的小行星將再次與地球近距離接觸。目前,這顆小行星已引起各方注意,專家預計它對地球帶來威脅的概率很小,撞擊地球的可能性約為七千分之一。

        資料圖:據外媒報道,這顆代號99942的近地小行星又稱阿波菲斯(Apophis),俗稱“死神星”。這顆小行星屆時將在距離地球19000英里(約3萬公里)處飛掠,不會直接撞擊地球。盡管如此,它的大小和相對近地距離,對于天文學家和科學家而言,仍是個特殊時刻。圖片來源:美國宇航局
        資料圖:據外媒報道,這顆代號99942的近地小行星又稱阿波菲斯(Apophis),俗稱“死神星”,10年后將和地球擦肩而過。圖片來源:美國宇航局

          據報道,“2006 QV89”小行星的直徑約為131英尺(合39米),在9月9日撞擊地球的概率為0.014%。但模擬結果顯示,它在670多萬千米的高空掠過地球的可能性很大。

          報道稱,“2006 QV89”小行星并不是第一次接近地球,它曾分別在1950至1990年期間數次接近地球。據歐洲航天局稱,2019年之后,它將在2032年再次接近地球。

          該小行星在歐洲航天局(ESA)風險列表中870個天體之中排名第四,也是前10名中唯一有可能在2019年造訪地球的對象。據悉,此風險列表包含已檢測到的給地球帶來非零影響概率的所有天體,是ESA的風險清單通過巴勒莫(Palermo)評級來衡量近地物體的危險性并整理出的名單。

        【編輯:李夏君】
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