Nasa has delayed the return to Earth of space shuttle Atlantis as a result of bad weather at the landing site, BBC reported.
Officials decided to abort landing at the Kennedy Space Center on Saturday, for the second consecutive day.
Instead, an attempt will be made to land on Sunday, either in Florida or at Edwards Air Force Base, California.
Astronauts aboard Atlantis are preparing to return to Earth after an ambitious and risky mission to re-fit the Hubble telescope.
The shuttle has enough supplies to remain in orbit until Monday if necessary.
Its mission was intended to give a new lease of life to Hubble.
The orbiting observatory is regarded as one of the most important scientific tools ever built.
The fifth and final mission to service Hubble has been hailed as a great success.
Over five spacewalks, astronauts installed new instruments and thermal blankets, repaired two existing instruments, replaced gyroscopes and batteries.
The only disappointment was the failure to restore the high resolution channel (one of three) on Hubble's main camera - the Advanced Camera for Surveys (ACS).
The US space agency has cleared Atlantis for its fiery re-entry into Earth's atmosphere following in-flight inspections of its heat shield by the crew.
The Hubble telescope was released from the shuttle's robotic arm on Tuesday.
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