The past water year, October 2024 through September 2025, brought the highest Arctic air temperatures since records began 125 ...

They won't be home for Christmas, but that's okay. They may not be home for Christmas, but astronauts in space are finding ...

The hours following sunset on Dec. 25 offer a wealth of naked-eye astronomy targets that can put even the most glitzy Christmas lights to shame, especially when viewed from a dark sky location.

Space debris – the collection of defunct human-made objects in Earth's orbit – is already affecting space agencies, companies and astronauts. This debris includes large pieces, such as spent rocket ...

The Roman Space Telescope is one of NASA's next great observatories, designed to explore some of the biggest questions in modern astronomy. From probing the mysterious nature of dark energy to ...

Long before modern telescopes, early astronomers mapped the heavens with math, myth, and sheer curiosity. This crossword quiz celebrates the minds who first charted the cosmos.