Where Elon Musk talks openly about building a city on Mars, NASA has been careful to draw a line between exploration and colonization. The agency has long voiced a desire to send astronauts to explore ...

The race to Mars has quietly become the defining contest of twenty-first century spaceflight, pitting a state-backed Chinese program, a commercially driven SpaceX campaign, and a methodical NASA ...

Our biggest obstacle might not be technological,” author Scott E. Solomon said of future life on Mars. “It might be us.” ...

We’re going back to the moon. Well, at least that’s the hope.

Musk’s announcement comes as NASA plans to send four astronauts around the Moon on a crewed flyby in the Artemis II mission ...