It could be an “eyeball” planet with an ocean in the middle, resembling an iris, and surrounded by solid ice. The exoplanet LHS-1140b was discovered in 2017. It orbits a low-mass red dwarf ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white ...

After tracking a puzzling X-ray signal from a dying star for decades, astronomers may have finally explained its source: The old star might have destroyed a nearby planet. Dating back to 1980, X ...