huangcongwq 发表于 2017-4-6 13:17

Comet PanSTARRS (C/2015 ER61) in Outburst and Binocular Bright

http://www.skyandtelescope.com/astronomy-news/comet-er61-panstarrs-in-outburst-binocular-bright/

qyz21new 发表于 2017-4-10 08:40

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