Photos: Atlas 5 rocket aims for International Space Station

The next three-man crew to launch on a Soyuz rocket — comprising two Russian cosmonauts and a veteran NASA astronaut — is training to have the International Space Station to themselves after their arrival at the orbiting research outpost in April, at least until new U.S. commercial crew ships enter service.

Russian ground controllers decided Tuesday to delay the docking of a Progress supply freighter to the International Space Station until Thursday after telemetry signals indicated two radar navigation antennas may not have deployed following the ship’s launch from Kazakhstan.

Something went wrong with a Russian Progress cargo spacecraft moments before it deployed into orbit Tuesday on the way to the International Space Station, and investigators are analyzing whether the stricken supply ship may have lost control after a botched separation from its Soyuz rocket booster.