In a testing procedure, the X-37B Orbital Test Vehicle taxis on the flightline on March 30 at the Astrotech facility in Titusville, Fla.
Air Force spokesman says X37-B space plane is not a "weaponization of space."
The secretive X-37B robot space plane was launched late Thursday. Destination unknown.
The X-37, an unmanned miniature space shuttle, is set to launch Thursday night. Slowly, some details have begun to emerge about the mysterious Pentagon space plane.
Shrouded in secrecy, the Air Force mystery spaceship X-37B will launch tonight in Florida.
The Pentagon took over the X-37 program in 2006 after NASA couldn't keep it alive. But the Air Force has been tight-lipped about the spaceship. The craft will launch this month.
NASA is scheduled to launch its WISE space observatory Monday. It will map the whole sky in infrared wavelengths, potentially revealing objects many telescopes can't see.
A NASA satellite designed to study carbon emissions is sleeping with the fishes somewhere off Antarctica.