Officials say a Russian "Progress" cargo ship has failed to successfully dock with the International Space Station during tests designed to ensure the effectiveness of future docking attempts.
A Russian Mission Control Center spokesman told the Interfax news agency on July 24 that the reasons behind the failure are being investigated.
He said that at a distance of 15 kilometers from the space station, the control system warned of a possible emergency and called off the docking.
Russian Mission Control says the ship is under full control and there is no danger of a collision with the space station.
The U.S. space agency NASA said in a statement that the next docking attempt could occur on July 28 or July 29.
The cargo ship undocked from the station on July 22 in order to perform the tests.
A Russian Mission Control Center spokesman told the Interfax news agency on July 24 that the reasons behind the failure are being investigated.
He said that at a distance of 15 kilometers from the space station, the control system warned of a possible emergency and called off the docking.
Russian Mission Control says the ship is under full control and there is no danger of a collision with the space station.
The U.S. space agency NASA said in a statement that the next docking attempt could occur on July 28 or July 29.
The cargo ship undocked from the station on July 22 in order to perform the tests.