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

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

Long before the full moon rises, shifting sunlight transforms the lunar surface into one of the sky's best telescope targets.

Letters to the editors for the February 2026 issue of Scientific American ...

Watch the moon phases and libration for 2024, as seen from Earth's Northern Hemisphere, in this time-lapsed animation that is ...

On April 25, 2024, I was walking in the Ouachita National Forest, with my wife and other  Master Naturalists, studying mosses ...

Artemis astronaut Jeremy Hansen described the crew's recent return to Earth as "the best roller coaster ride you've ever been on." "For the landing, it's like all the sights, all the feels," Hansen ...

A bright full moon will light up the sky this weekend as it rises in Scorpio. Here's what to know about the special May 2026 flower moon. Tonight's full moon will be the May flower moon, but not the ...

The first of two full moons in May 2026 will happen on May 1. Completely round and full, the full moon will be in the ambitious, mysterious sign of Scorpio. The date alone has a special vibe about it: ...

NASA’s Artemis II mission sent four humans to the moon for the first time in more than half a century. And it is just the beginning. In a speech at a space policy event on Tuesday, NASA chief Jared ...