The Boeing X-37 OTV (Orbital Test Vehicle) is an unmanned spacecraft similar to the space shuttle in appearance that made its first flight on April 22 of last year. The flight lasted for 225 days and the OTV successfully landed on Vandenburg Air Force Base on December 3 of that year.
The OTV is powered by solar energy during its orbit. It features new thermal protection technology, avionics systems, and an autonomous guidance system.
The OTV has generated much controversy. Amateur astronomers have claimed that they have spotted the spacecraft in orbit and states that the course the spacecraft is on brings it over hotspots around the globe such as Iran, North Korea, and Afghanistan. The China Daily newspaper picked up the story and stated that the X-37 is raising concerns of a space arms race.
Right now, the X-37 is already well on its way orbiting the planet on its second mission. It launched on March 5 this year in Cape Canaveral.