親子觀星會
討論區 => 天文新知 => 主題作者是: peter 於 2017-01-04 08:41:30
主題:
2016/12~2017/2/24 靠近地球小行星資訊
作者:
peter
於
2017-01-04 08:41:30
http://spaceweather.com/
On January 4, 2017 there were 1756 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters
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