Our understanding of the true nature of the cosmos relies on measurements of its expansion, but cosmologists have been ...

New data confirm that the titanic collisions of galaxies ignite the most powerful active galactic nuclei.Active galactic nuclei (AGN) are phases in ...

Unlike YR4, finding earlier observations of 3I/ATLAS to model where it might have come from was easier said than done. During ...

Data collected using multiple NSF NOIRLab facilities reveal a gamma-ray burst that lasted more than seven hours and ...

What does it take for a comet to look like it’s from another world? For interstellar visitor 3I/ATLAS, the answer came in the form of this striking astrophotograph showing the comet’s shimmering green ...

The interstellar comet 3I/ATLAS will make its closest approach to Earth this week on Dec. 19, 2025. Here's the latest news ...

Now passing through the constellation Leo, the interstellar object sits at a distance so immense that the light from it takes ...