This photo provided by Virgin Galactic shows Virgin Galactic's SpaceShipTwo under rocket power, its first ever since the program began in 2005. The spacecraft was dropped from its "mothership," WhiteKnightTwo, over Mojave, Calif., on Monday, April 29, 2013. The spaceship, bankrolled by British tycoon Sir Richard Branson, made its first powered flight in a test that moves Virgin Galactic toward its goal of flying into space later this year. While SpaceShipTwo did not break out of the atmosphere during the test flight, it marked a significant milestone for Virgin Galactic, which intends to take passengers on suborbital joyrides. (Photo: AP/Virgin Galactic, Mark Greenberg)

MOJAVE, Calif. (AP) -- Virgin Galactic's SpaceShipTwo made its first powered flight Monday, breaking the sound barrier in a test over the Mojave Desert that moves the company closer to its goal of flying paying passengers on brief hops into space.

"It couldn't have gone more smoothly," said Sir Richard Branson, who owns the spaceline with Aabar Investments PJC of Abu Dhabi.

A special twin-fuselage jet carrying SpaceShipTwo took off at about 7:00 a.m. PDT, spent 45 minutes climbing to an altitude of 48,000 feet and released the spaceship. Pilot Mark Stucky and co-pilot Mike Alsbury then triggered SpaceShipTwo's rocket engine.

The engine burned for 16 seconds, propelling the spaceship to an altitude of 55,000 feet and a velocity of Mach 1.2, surpassing the speed of sound. SpaceShipTwo then glided to a safe landing at Mojave Air and Space Port in the desert north of Los Angeles, said George Whitesides, Virgin Galactic's CEO.

Watch the test:

The 10-minute test flight was considered a major step for the program.

"Having spaceship and rocket perform together in the air is a long way toward getting into space," said Branson, who watched from the ground. "A few more test flights with slightly bigger burns every time, and then we'll all be back here to watch it go into space."

British billionaire Richard Branson poses for photographs in the window of a replica of the Virgin Galactic, the world's first commercial spaceline, at the Farnborough International Airshow in Hampshire, southern England, on July 11, 2012. Virgin Galactic announced "LauncherOne," a new air-launched rocket specifically designed to deliver small satellites into orbit. Commercial flights of the new orbital launch vehicle are expected to begin by 2016, Virgin Galactic aims to offer frequent and dedicated launches at the world's lowest prices. (Photo: ADRIAN DENNIS/AFP/GettyImages)

Until Monday, SpaceShipTwo had only performed unpowered glide flights. Several powered flights are planned this summer, culminating with a dash into space targeted toward the end of the year.

SpaceShipTwo is a prototype commercial version of SpaceShipOne, which in 2004 became the first privately developed manned rocket to reach space. Since the historic flight, more than 500 aspiring space tourists have paid $200,000 or plunked down deposits, patiently waiting for a chance to float in weightlessness and view the Earth's curvature from 62 miles up.

Branson initially predicted commercial flights would begin in 2007, but a deadly explosion during ground testing and longer-than-expected test flights pushed the deadline back.

No date has been set for the first commercial flight from a custom-designed spaceport in New Mexico, but Virgin Galactic executives have said it will come after testing is complete and it secures approval from the government. Branson previously said the maiden passenger flight will carry his family.

SpaceShipTwo was built by Mojave-based aerospace research company Scaled Composites LLC, which was founded by cutting-edge aviation designer Burt Rutan. His SpaceShipOne, funded by Microsoft co-founder Paul Allen, made three suborbital flights into space - reaching altitudes of 62 miles (100 kilometers) or greater- and won the $10 million Ansari X Prize.

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