Virgin Galactic’s SpaceShipTwo suborbital spaceplane Unity powered its way at Mach 2.9 to an altitude of more than 51 mi. above Southern California on Dec. 13, going higher and faster than ever before and setting the scene for the long-anticipated beginning of space tourism flights in 2019. The record-setting flight, which began with a takeoff from Mojave Air and Space Port beneath the WhiteKnightTwo carrier aircraft at 7:11 a.m. local time, was the fourth rocket-powered test for ...


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