The latest visitor from deep space is leaving a mark that stretches far beyond its icy core. Interstellar comet 3I/ATLAS is wrapped in an enormous X-ray glow that extends roughly 250,000 miles into ...

ESA's advanced XMM-Newton telescope discovered a faint X-ray glow from the 3I/ATLAS comet. What is this mysterious light it emits?

At the ragged frontier where the Sun’s influence gives way to the galaxy, a decades‑old spacecraft has stumbled into a ...