Valery Polyakov, cosmonaut who logged longest space mission, dies at 80
Cosmonaut Valery Polyakov, who logged the single longest stay in space, has died at the age of 80. Polyakov launched on two missions to the space station Mir. In total, he was off Earth for 678 days.
TroibNews 
Cosmonaut Valery Polyakov, who logged the single longest stay in space, has died at the age of 80. Polyakov launched on two missions to the space station Mir. In total, he was off Earth for 678 days.
