On April 22, 2010, the U.S. Air Force launched the super-secret X-37B space plane on its first spaceflight. Discover more space history 👉 https://space-com.visitlink.me/alqSlV This space plane is also known as the Orbital Test Vehicle. It looks a lot like NASA's space shuttle, only it's much smaller and doesn't have any windows. But the X-37B doesn't need windows anyway, because no one actually flies in it. It's completely autonomous and can even land on a runway without a human pilot. The X-37

From NASA’s Mars landing to billionaires in space, here are some of the top moments in space exploration this year. | Reuters

We have a mission for you. Test your space travel knowledge with our quiz: goo.gle/spacequiz 🚀 | Google Earth