SpaceX’s private Polaris Dawn astronauts will return to Earth early Sunday. Here’s how to watch live online Space.com41-year-old who just completed the first civilian spacewalk dropped out of high school to start his $7 billion business CNBCRecord-setting Polaris Dawn crew aims for early Sunday splashdown in Gulf of Mexico CBS News‘A giant leap’: Why a tech billionaire’s climb outside a spacecraft was so historic CNNPolaris Dawn set to return home after landmark commercial spaceflight NASASpaceflight.com