With the arrival of Mir, a new version of the supply ship, known as Progress-M, was brought into service. This had a recoverable capsule that could be used to return material, such as samples of crystals grown under weightless conditions, to Earth.
The latest version of Progress, called the Progress-M1, has a larger cargo capacity and has been developed for use with the International Space Station. Progress-M1 can carry up to 2,230 kilograms of cargo, of which a maximum of 1,950 kilograms can be propellant and a maximum of 1,800 kilograms can be equipment or supplies.
Related category• MANNED SPACEFLIGHT
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