From the Houston Chronicle: "Astronauts allowed extra hour of sleep"
The crew of the space shuttle Atlantis got to sleep in late Saturday and take a half day off after three arduous and successful spacewalks and a jam-packed week in orbit.
For the shuttle crew, Saturday in space began with a surprise extra hour to sleep as Mission Control purposely put off the morning wake-up call by an hour.
When they awoke, it was to the mellow beach-evoking sounds of Jimmy Buffett’s "Twelve Volt Man".
Astronaut Dan Burbank, whose family sent up the song, called it "a great way to start a day up here in space."