Comet 3I/ATLAS, the third interstellar object ever detected, reached its closest point to Earth overnight from Thursday to Friday (Dec. 18 to 19), and it remains in a good viewing position tonight.

A piece of space debris is the focus of the closest attention of astronomers worldwide as scientists evaluate a rare, but ...

Learn how Mount Wilson Observatory was founded on Dec. 20, 1904, the people involved, and the decisions that shaped early modern astronomy ...

Another batch of the ‘impossible’ galaxies turned out not to be standard galaxies at all, but a new type of object that ...

You are watching a long-held idea in stellar physics face serious scrutiny. Researchers at Chalmers University of Technology, ...

A year-end recap of 2025 in space, covering NASA leadership changes, space policy, major missions, scientific discoveries and key events across orbit and beyond.

From crewed Moon flybys to Mars test flights, 2026 reshapes global space ambitions, with NASA, ISRO, SpaceX, China and Europe planning missions that signal where exploration heads next globally ahead.

For most of us who are not astronomers, the image that comes to mind when describing a reflecting telescope is of a huge instrument in its own domed-roof building on a mountain top. But a ...

Uri Geller alleges NASA is hiding alien remains tied to interstellar comet 3I/ATLAS, sparking debate amid scientific evidence ...

But Americans are also less confident that the government will be able to make progress on the important problems facing the country in 2026. About 66% of U.S. adults say they are “slightly” or “not ...

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

Early risers across North America and Europe may spot a bright, silent light gliding across the Christmas sky — and it just ...