A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

Amir Siraj and team propose Planet Y, a possible unseen planet influencing Kuiper Belt object orbits. Vera C. Rubin ...

Sub-Neptune exoplanets tend to be much closer to their host star than Earth is to the Sun and are thought to have atmospheres made of steam over layers of an exotic phase of water that behaves like ...

Astronomers around the world have confirmed over 6,000 exoplanets, a milestone reached in September 2025. Billions more are waiting to be discovered.

Scientists using the James Webb Space Telescope have obtained what they call the strongest signs yet of possible life beyond our solar system. They detected in an alien planet's atmosphere the ...

This latest study, published in the science journal arXiv, says a warping effect which was picked up in the orbits of some Kuiper belt objects suggests an undiscovered planet. According to ...

London: From tentative evidence of habitable planets to the eyebrow-raising suggestion an interstellar comet might not be what it seems, the possibility of life beyond our solar system has long ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

MSU uncovered images of 3I/ATLAS from two months before it was detected as an interstellar object. These images indicate that the comet was active further from the sun than expected, indicating that ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...