Factbox-Bezos, Branson and Musk: Who is winning the space tourism race?

FILE PHOTO: Amazon and Blue Origin founder Jeff Bezos addresses the media about the New Shepard rocket booster and Crew Capsule mockup at the 33rd Space Symposium in Colorado Springs, Colorado, United States April 5, 2017. REUTERS/Isaiah J. Downing

(Reuters) - Three billionaire entrepreneurs - Jeff Bezos, Elon Musk, and Richard Branson - are each vying to usher in a new era of private commercial space travel.

Here is how their rival ventures compare in the race to open up space travel.