Mars changed from a blue world with water to a red desert because its atmosphere escaped into space over billions of years.

A bevy of comets, a "blood moon" total lunar eclipse and impressive northern lights were just three of the skywatching highlights in 2025. Here's how they unfolded.

Saturday's launch marked Blue Origin's 16th New Shepard flight with passengers aboard since Bezos, his brother and two others ...

Mars at sunset reveals dozens of razor-thin atmospheric layers in stunning detail, helping scientists map dust and ice ...

The northern and southern lights, especially active lately, have been treating sky watchers to spectacular shows. But what ...

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what ...

A number of factors determine the visibility of the moon during the daytime, chief among them the scattering of the sun’s ...

A common kestrel hovers gracefully above bare branches in the quiet of a misty morning, its silhouette standing out against the calm blue of the foggy woods.

From an interstellar comet to breathtaking auroras and from brand-new rockets to iconic space telescopes, here are some of our favorite images from the cosmos in 2025 ...

Interstellar comet 3I/ATLAS makes its closest approach to Earth on Dec. 19. Here's how you can track its progress both during ...

Mars continues to astonish scientists with a new set of images that reveal the Red Planet’s atmosphere in unprecedented ...

“Liverpool are the best team in the world, never mind anywhere else.” – Ally McCoist suggesting that Arne Slot’s lads weren’t ...