地球軌道上の衛星・宇宙船・宇宙ゴミ

Every Satellite, Spacecraft, and trackable piece of Space Junk in orbit around Earth.(via galaxyclusters) - See more at: http://cosmosplasma.tumblr.com/post/4908611079/every-satellite-spacecraft-and-trackable-piece#sthash.pz6aarY7.dpuf