Stratolaunch Systems continues a trend for Paul Allen, who has funded several different spaceflight and astronomy efforts over the years.
Microsoft co-founder Paul Allen announced plans to construct a giant aircraft to launch rockets into orbit, eventually for paying passengers.
A timeline of significant moments in America's quest to reach for the stars.
Virgin Galatic's 'SpaceShipTwo' successfully completed a glide test over the California desert on Wednesday.
Virgin Galactic SpaceShipTwo spacecraft, the VSS Enterprise, could make its first drop flights over California's Mojave Desert for glide and landing tests this fall, says the company.