OK you've all been trying hard, here's a labelled version to help you out. DOS-3 and DOS-6 are better known by their codenames Kosmos-557 and Salyut-7 pic.twitter.com/NLZu8HjREr— Jonathan McDowell (@planet4589) March 25, 2018
OK you've all been trying hard, here's a labelled version to help you out. DOS-3 and DOS-6 are better known by their codenames Kosmos-557 and Salyut-7 pic.twitter.com/NLZu8HjREr