Aerospace | GRHardnessTester.comAfter almost 2 full years on orbit, the Us military’s mysterious robot space plane is expected to land back on Earth.  The plane, X-37B, launched on Dec 11, 2012 on a top secret military mission.  It is about 29 feet long, has a wing span of about 15 feet, and weighs about five tonnes.  The speed it travels at is 25 times faster than the speed of sound.

 

Click HERE to read the full article by Agence France-Presse on Defense News.