Venus, Saturn and the moon will form a triple conjunction, appearing to look like a smiley face in a sky. Here's how and when ...

"Everybody's dancing in the moonlight." The popular song by King Harvest gets some new meaning after the first moonlight ...

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Photographer extraordinaire Don Pettit is about to return to Earth following a seven-month stay aboard the space station. Take a moment to enjoy his best work.

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

Chinese researchers analyzed the first-ever soil samples returned from the far side of the moon, but further samples will be ...

The next full moon is at 12:56 pm EST on Monday, May 12 and is known as the Flower Moon. Here is a look at all the full moons ...

Look to the eastern sky, and a clear horizon will show you this unusual, grinning planet alignment thanks to the crescent ...

HOUSTON, Texas ( KIAH ) — Each April, Earth crosses a trail of ancient dust in space, triggering a quiet but beautiful ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

Skywatchers worldwide are in for a charming cosmic display before the sun rises next week as three celestial bodies will ...