A massive and unusual exoplanet, TOI-5205 b, is offering astronomers fresh clues about how planets form and evolve, and raising new questions about long-standing theories. The Jupiter-sized planet ...

Did NASA discover city lights on an alien planet?

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...