Russia Launches Robot Cargo Ship Toward Space Station

Russia's unmanned supply ship Progress 47 launched toward the International Space Station on April 20, 2012.
Russia's unmanned supply ship Progress 47 launches toward the International Space Station on the morning of April 20, 2012. (Image credit: NASA)

A robotic Russian cargo spacecraft launched toward the International Space Station Friday (April 20) to ferry tons of gear for the orbiting lab's crew, a flight that comes just 10 days before an American private spaceship is expected to make a historic supply run of its own.

The unmanned Progress 47 supply ship blasted off from the Baikonur Cosmodrome in central Kazakhstan at 8:50 a.m. EDT (1250 GMT) today, reaching its preliminary orbit less than 10 minutes later, NASA officials said. The supply ship, which is carrying 2.5 tons of food, fuel and supplies, is slated to dock with the space station at 10:40 a.m. EDT (1440 GMT) Sunday (April 22).

Progress 47 will replace the trash-filled Progress 46 ship, which undocked from the station Thursday and will be intentionally commanded to burn up in Earth's atmosphere over the Pacific Ocean in the days ahead. Progress 47 will meet the same fate in late July, officials said.

Progress 47's liftoff comes 10 days before the scheduled launch of the private spaceflight company SpaceX's unmanned Dragon capsule, which is due to blast off on a demonstration flight to the station on April 30. The California-based SpaceX — short for Space Exploration Technologies Corp. — holds a $1.6 billion NASA contract to make 12 supply runs to the orbiting outpost.

Dragon's debut trip to the space station is not one of those 12 contracted missions for NASA. Instead, it is a demonstration mission to see if Dragon and its Falcon 9 rocket ride have the robotic "right stuff" to meet NASA's needs. Even so, the reusable Dragon will carry about 1,150 pounds (521 kilograms) of cargo up and — unlike the expendable Progress vehicle — will transport roughly the same amount of material back down to Earth, SpaceX officials have said. [Dragon, SpaceX's Private Spaceship (Photos)]

If Dragon succeeds, it will be the first private spacecraft, and the first unmanned American spaceship, ever to berth with the station.

When NASA retired its space shuttle fleet last July, it became completely dependent on Russian, European and Japanese vessels to carry cargo and crew to the space station. NASA isn't content with this state of affairs, however; it's encouraging private American firms to develop both robotic supply ships and manned astronaut taxis.

NASA is looking to SpaceX and the Virginia-based Orbital Sciences Corp. to begin shouldering the cargo load in the next year or so; Orbital holds a $1.9 billion deal to make eight supply flights.

The space agency has also given money to SpaceX, Blue Origin, Sierra Nevada and Boeing to help them develop crewed craft. NASA has said it wants at least two of these firms' vessels to be in operation by 2017. SpaceX is modifying Dragon to carry up to seven astronauts, and company officials have estimated the crewed version could be up and running in about three years.

You can follow senior writer Mike Wall on Twitter: @michaeldwall. Follow for the latest in space science and exploration news on Twitter @Spacedotcom and on Facebook.

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at:

Mike Wall
Senior Space Writer

Michael Wall is a Senior Space Writer with and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.