Mars, a world now circled by two lumpy rocks, may once have hosted a colossal companion that dominated its sky. New work on the planet’s tides, topography and wobbly interior points to a “lost” ...

Elon Musk has long had a passion for Mars. The moon? It's a diversion. But that plan has now shifted. SpaceX will “prioritize going to the moon first,” said The Wall Street Journal. Just last year, ...

In a recent announcement, Musk promised to lead a "new era in space flight," delaying his Mars plans in order to aim for an uncrewed moon landing by March 2027—little over a year away. “We're gonna go ...

NASA's Artemis program aims to return humans to the moon, which is seen as a stepping stone for future missions to Mars. The upcoming Artemis II mission will be a 10-day test flight circling the moon ...