CAPE CANAVERAL, Fla. – The U.S. military’s mystery space plane rocketed into orbit again Sunday, this time with an extra load of science experiments.
It’s the sixth flight of an X-37B, a solar-powered plane that's flown by remote control without a crew. Officials aren't saying how long the spacecraft will remain in orbit this time or the purpose of the mission.
The previous mission lasted a record two years, with a touchdown shrouded in darkness at NASA's Kennedy Space Center last year.
The winged spacecraft resembles NASA’s old shuttles, but is considerably smaller at 29 feet long. The one just launched features an extra compartment for experiments, including several for NASA.