NASA's challenge is what comes next. Getting Artemis 3 astronauts from lunar orbit to the moon surface. To do that, NASA in 2021 awarded a nearly $3 billion contract to Elon Musk's SpaceX for the lunar lander version of its Starship, the biggest, most powerful launch vehicle ever built.Made of two components, the lunar lander will sit a top the reusable Superheavy booster. After several spectacular failures and explosions, Starship rebounded with successful launches this past August and October. But the set ...