For years, astronomers have toyed with the idea that the Sun hides an extra planet so distant and dim that even the best ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

That means there could be significantly more life actively developing in the waters of this distant planet than is on ... dissolved sulfur compounds. In the background, faint silhouettes of ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

A chemical called dimethyl sulfide popped up in an analysis of exoplanet K2-18b’s atmosphere. On Earth, it’s only made by ...

Astronomers detected a possible signature of life on a planet orbiting a star 120 light-years away,” it read. Soon after, The ...

and the distance from Earth to the background source whose light is distorted. "In fact, it was the realization of this coincidence in the early 1990s that led to the first microlensing planet ...

Earth" planet was discovered by researchers. It is not believed these planets are more common than previously thought.

Astronomers claim they've found the most promising signs of possible life on a planet outside of our solar system.

The James Webb Space Telescope spotted possible signatures for life in an exoplanet's atmosphere. Still, researchers caution it’s far too early to call the findings definitive ...

(CNN) — A team of astronomers have detected what they call the most promising signs to date of a possible biosignature, or signs of past or present life linked to biological activity, on an ...