爽やかな朝にやっとクリーニングをだした…土曜なのにな…ﾌﾌ…NASA_SDO: Solar wind affects Mercury too! Learn more about recent #NASA findings in this neat @earthskyscience article: http://cot.ag/p4pKq9太陽風と水星の天候SOFIAtelescope: Basic Scie…