The Atlantis and its crew will remain in orbit for another day Saturday after NASA officials cancelled all landing attempts due to thunderstorms in Florida.
NASA decided to keep the Atlantis and its seven crew members in orbit rather than try a landing at Edwards Air Force Base in Southern California.
If Atlantis had been permitted to land in California, it would have cost NASA $2 million to ferry the shuttle back to Florida.
Forecasters are calling for clearer weather in Florida on Sunday.
The shuttle had previously scheduled to land around 9:15 a.m. ET Saturday at Kennedy Space Center, but NASA officials cancelled that attempt due to offshore storms.
Storms also prevented the Atlantis from touching down Friday.
The Atlantis can remain in orbit until Monday before it begins to run out of supplies.
The shuttle and its six crew members took off from Cape Canaveral on May 11 for the last visit to the 19-year-old Hubble Space Telescope.
Astronauts conducted five spacewalks to repair and update the aging observatory, including adding new instruments, as well as replacing batteries and gyroscopes.
NASA officials hope the upgrade, which cost $1 billion, will keep the telescope operating for another five to 10 years.
With files from The Associated Press
