Here's when to see a pair of massive letters shining on the lunar surface around May's first quarter moon phase.

Slicing through the Montes Alpes mountain range, Vallis Alpes is a favorite feature to view on the First Quarter Moon.

Tonight marks the First Quarter Moon, when roughly half of the Moon’s visible face is illuminated. As of Saturday, May 23, ...

To begin with — there is no “dark side of the moon,” a phrase I heard repeatedly during the recent epic flight of Artemis II ...

For 10 days in April, NASA’s Artemis II crew traveled around the far side of the Moon and back, marking one of the most ...

Despite being the closest planet to the sun, Mercury has thick deposits of ice at its poles, and now we may understand the ...

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This ...

Lunar Outpost's Pegasus rover is the "trusted steed" that will enable Artemis missions to "explore more boldly than ever ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

A hidden crater in South Korea may hold clues to one of the biggest turning points in Earth’s history: the rise of oxygen. Scientists discovered fossil-like stromatolites — layered structures built by ...

Four southern Idaho national parks welcomed a combined total of more than 430,000 recreation visits in 2025, including a ...

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, ...