Given Miranda has a radius of just 146 miles (235 kilometers), the ocean would have filled almost half of the moon's body. "That result was a big surprise to the team," Strom said. Key to creating ...

A robotic lander named Athena has made its final descent to the moon’s surface, marking the second lunar touchdown for a US company this week. But the orientation of the lander is currently unknown.

Athena didn’t crash. But what did happen to it? Hours after the 15-foot-tall robotic spacecraft arrived at the moon’s surface, closer to the lunar south pole than any spacecraft has been ...