Refueling in orbit has never been achieved ... to transfer at least 10 metric tons of liquid oxygen from a header tank to ...

Robert Zubrin, the planet’s leading strategist for landing humans on Mars, predicts SpaceX’s Starship will win the race to speed astronauts to Mars, but not until 2031.

But on Monday, his towering Starship rocket will return ... also needs to demonstrate complex in-orbit refueling—using other Starships as fuel tankers—to enable long-distance space travel.

It could also be lifted to Earth orbit fully fueled by a single Starship and sent directly to Mars with five tons of cargo without any Earth-orbit refueling, or 25 tons of cargo with a single tanker ...

SpaceX's Starship launcher spun out of control minutes after liftoff Thursday, showering fiery debris over the Bahamas and dealing another setback to Elon Musk's rocket program after a failure under ...