Tuesday, December 26, 2017

Crater Tsiolkovsky as photographed during the Apollo 8 lunar orbit mission, looking East toward the lunar horizon. Tsiolkovsky is approximately 150 statute miles in diameter. It was first identified and named by the Russians from photographs taken by their unmanned Luna III spacecraft[3000x3000]

http://bit.ly/2DTslBc via /r/spaceporn http://bit.ly/2pDw6ru