Gingrich vows to establish a colony on the moon (Update)

Republican presidential hopeful Newt Gingrich has stirred strong passions by claiming he will establish a permanent moon base by 2020 if elected, but experts say he is living on another planet.

What's a suborbital flight? An aerospace engineer explains

"Suborbital" is a term you'll be hearing a lot as Sir Richard Branson flies aboard Virgin Galactic's VSS Unity winged spaceship and Jeff Bezos flies aboard Blue Origin's New Shepard vehicle to touch the boundary of space ...

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