MOSCOW — The Russian space agency Roscosmos says Soviet-era cosmonaut Georgy Grechko has died at age 85.

The Roscosmos statement yesterday did not state a cause of death.

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Grechko made three trips into space between 1975 and 1985, spending a total of 134 days above the Earth. His longest was a stay of more than three months aboard the Salyut-6 space station in 1977-78.

Grechko later became a cosmonaut instructor and joined the faculty at the Russian Academy of Sciences’ Institute of Atmospheric Physics.