SpaceShipOne, the only manned spacecraft to be flown by a private company, has been hung in Washington's National Air and Space Museum.
The record-setting vehicle has been put in the museum's central gallery next to Charles Lindbergh's Spirit of St Louis and Chuck Yeager's Bell X-1.
The donation to the famous US museum was marked by a special ceremony.
It was attended by Burt Rutan, the designer of SpaceShipOne, and Microsoft co-founder Paul Allen, the sole funder.
On 21 June 2004, SpaceShipOne rocketed into space, travelling just above the 100km (62 miles) boundary that marks the edge of Earth's atmosphere.
It was first carried to 13.8km (46,000ft) by its launcher, White Knight, after which it was unleashed, firing its engine to continue the journey upwards.
This milestone flight made it the world's first privately built and piloted vehicle to reach space.
"SpaceShipOne represents the next step in travelling beyond our planet," museum director General JR "Jack" Dailey said.
"It will inspire the next generations eager to experience a new accessibility to space."
The National Air and Space Museum (NASM) collection now contains five vehicles designed by Burt Rutan.
The building's south lobby gallery displays Rutan's Voyager aircraft, which in 1986 made the first non-stop flight around the world without re-fuelling.
Commercial spaceliners will now follow SpaceShipOne
In October 2004, SpaceShipOne flew to an altitude of more than 100km twice in one week to claim the $10m Ansari X-Prize, initiated to galvanise private space travel.
The NASM has also introduced interactive kiosks in the Milestones of Flight gallery where SpaceShipOne is hanging.
These will allow visitors to view footage of the spacecraft in flight, learn about its place in aviation history, and study its cockpit through 360-degree, high-resolution photography.