From the Beeb;
Anything of concern?Astronauts on board the US space shuttle Discovery have reported seeing an object drifting away from the craft.
Shuttle crew said the object was 30-45cm (1-1.5 feet) long. Nasa engineers are trying to identify it from pictures taken by astronauts.
A Nasa official said it was not unusual for objects to become dislodged from the shuttle or its payload bay.
Nasa engineers are also trying to identify a bump sticking out from the shuttle's tail rudder.