Russian Cargo Ship Docks at Space Station Ahead of Shuttle Launch

The unmanned Russian Progress 42 cargo ship is seen by a video camera on the exterior of the International Space Station just before docking on April 29, 2011.
The unmanned Russian Progress 42 cargo ship is seen by a video camera on the exterior of the International Space Station just before docking on April 29, 2011. (Image credit: NASA TV)

An unmanned Russian cargo ship arrived at the International Space Station today (April 29), just over five hours before NASA's planned launch of the shuttle Endeavour toward the same destination in orbit.

The robotic Progress 42 cargo ship linked up with the space station at 10:28 a.m. EDT (1428 GMT) as the two spacecraft sailed 220 miles (354 kilometers) over western Mongolia. The cargo ship delivered more than 3 tons of supplies, equipment and other gear for the space station's six-person crew.

The orbital rendezvous came two days after the Progress 42 spacecraft's launch from Baikonur Cosmodrome in Kazakhstan and five hours before NASA's planned liftoff of space shuttle Endeavour.

Endeavour is currently counting down toward a planned 3:47 p.m. EDT (1947 GMT) launch from NASA's Kennedy Space Center in Cape Canaveral, Fla. If all goes well, Endeavour should arrive at the space station on Sunday and double the number of people living on the orbiting laboratory during the two-week mission.  [Complete Coverage: Shuttle Endeavour's Final Mission]

The mission will be the final flight of shuttle Endeavour and NASA's next-to-last  shuttle mission before the 30-year-old program shuts down for good later this year. Endeavour will deliver a $2 billion astrophysics experiment and spare parts during the mission. Four spacewalks are planned.

Endeavour was originally slated to launch on April 19, but NASA delayed the launch by 10 days to avoid a space traffic conflict with the Progress 42 spacecraft's flight.

A Russian Soyuz rocket blasts off from Baikonur Cosmodrome in Kazakhstan carrying the Progress 42 cargo ship on April 27, 2011. The Progress cargo ship will deliver supplies to the International Space Station. (Image credit: RSC Energia)

Russia's Federal Space Agency packed Progress 42 with 1,940 pounds (880 kilograms) of propellant, 110 pounds (50 kg) of oxygen and air, 926 pounds (420 kg)  of water and 2,976 pounds (1,349 kg) of maintenance hardware, experiment equipment and resupply items for the space station's crew.

The cargo ship, which is also known by the Russian designation Progress M-10M, parked at  the Earth-facing Pirs docking port on the International Space Station.  [Photos: Building the International Space Station]

Russia's Progress spacecraft resemble the country's three-module Soyuz capsules that carry cosmonauts and astronauts into orbit. Progress vehicles, however, carry a fuel pod in place of a crew module in order to replenish the space station's supplies.

Progress vehicles are disposable and routinely burn up in Earth's atmosphere once their missions are complete.

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Tariq Malik

Tariq is the Editor-in-Chief of and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.