There are tens of thousands of plum-sized pieces of space junk that hit with the power of a crashing bus, according to The Aerospace Corporation, which monitors orbital debris. That junk includes ...

"Mission 7 broke new ground by showcasing the X-37B’s ability to flexibly accomplish its test and experimentation objectives across orbital regimes." Gen. Chance Saltzman, chief of space ...

How does its orbital speed compare to that of other solar system planets? How fast you need to move to keep in a circular orbit around another body is dictated by how far the two bodies are ...