X-37B – The U.S. Space Plane Keeps Observers Guessing: At first glance, you think you are looking at a miniature version of the space shuttle, but the X-37B is an unmanned and autonomous space plane with its own quirks and characteristics. The craft is also known as the Orbital Test Vehicle, and it has flown six missions since 2010. At only 29-feet long, the X-37B is just a fraction of the size of the space shuttle. It’s also boosted into space on a rocket, and it lands horizontally like an airp
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