Key facts

Weight: About 143 tons, including its core module and five other components. Up to 154 tons with a cargo ship and escape capsule attached.

Cost: $4.2 billion to build and maintain, according to the Russian Space Agency.

Crews: Mir has hosted a total of 104 people, including 42 cosmonauts and astronauts from many other countries.

Missions: Forty-six expeditions were carried out on Mir and 23,000 scientific experiments.

•  In 1994-1995, Mir cosmonaut Valery Polyakov set the record for the longest space mission -- 438 days.

•  Between 1992 and 1999, cosmonaut Sergei Avdeyev racked up 747 days on Mir on three missions -- the longest total time a human has spent in space.

•  Mir cosmonaut Anatoly Solovyov made 16 spacewalks totaling 77 hours, another space record.