Half of the moon will be illuminated as it reaches its first quarter phase on Monday, June 2. The first quarter phase marks ...

Countless shadowed craters line the terminator all the way down to the moon's southern pole, while the 54-mile-wide (87 km) ...

Though full terraforming may take centuries, if not millennia, the long-term goal would be a Mars with stable liquid water, ...

NASA is moving closer to building the first permanent moon base as part of the Artemis program. With the success of the ...