New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

Before 3I/ATLAS, the only other confirmed interstellar tourists we've seen were the now-famous, cigar-shaped 'Oumuamua' in ...

New telescope images show interstellar comet 3I/ATLAS brightening and turning green after solar heating, raising questions ...

Interstellar comet 3I/ATLAS shows a growing green glow and new X-ray activity as scientists study changes in its chemistry during its rare passage through the Solar System ...

NASA’s Hubble Telescope photographed the comet on November 30. At that time, the comet was still very far — about 178 million ...

Astronomers have produced the first continuous, two-dimensional maps of the outer edge of the sun's atmosphere, a shifting, ...

Scientists uncover unusually high methanol levels "raging" beyond the nucleus of interstellar comet 3I/ATLAS, revealing ...

A NASA spacecraft is making a close approach to the sun, repeating its record-breaking distance of 3.8 million miles from the ...

Discovered on July 1 by the NASA-funded ATLAS telescope in Chile, 3I/ATLAS is only the third confirmed visitor from another ...

On December 8, 2025, the sun unleashed a significant solar flare, classified as an X-class event, raising concerns among scientists and technology experts alike. This article will explore the ...

NASA and ESA images reveal unusual activity on interstellar comet 3I/ATLAS as it heads for its closest Earth approach this ...

Researchers at the University of Hawaiʻi Institute for Astronomy (IfA) are helping reshape how scientists study the sun. The ...