Could Richard Branson call himself an astronaut after Sunday's Virgin Galactic flight?
  Commander Alan Shepard piloted his slot xo Mercury Freedom 7 spacecraft 116 miles above the planet's surface to become the first American to reach Earth orbit. On Sunday, Sir Richard Branson was taken to an altitude of 50 miles aboard Virgin Galactic's SpaceShipTwo Unity spacecraft. This discrepancy lies in the fact that since the beginning of the Space Age Earth's exoplanet superpowers...
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