NASA announced a new milestone in its search of the stars. It has now found more than 5,000 exoplanets -- those outside of our solar system. “It’s not just a number,” Jessie Christiansen, a researcher ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

A distant star system with four super-sized gas giants has revealed a surprise. Thanks to JWST’s powerful vision, astronomers detected sulfur in their atmospheres — a chemical clue that they formed ...

This year, the number of NASA-tracked confirmed worlds discovered beyond our solar system surpassed 6,000, and several thousand more await confirmation. The growing tally reflects how dramatically ...

Key takeawaysIf a gas giant planet is big enough to ignite deuterium fusion, it becomes a brown dwarf instead of a planet.

Scientists have discovered over 6,000 planets that orbit stars other than our sun, known as exoplanets. More than half of these planets were discovered thanks to data from NASA's retired Kepler ...

Computer simulations suggest NASA’s Habitable Worlds Observatory could detect Earth-like exomoons around gas giant exoplanets through reflected starlight and lunar eclipses.

Renowned Caltech astronomer Carl Grillmair, celebrated for discovering water on exoplanets, was tragically found shot dead at ...

Our solar system hosts almost 900 known moons; more than 400 orbit the eight planets while the remaining orbit dwarf planets, ...