An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.

Artist impression of the planetary system with four planets,around a small red star,called LHS1903. Caption: Astronomers have long thought solar systems follow a simple pattern similar to our own: ...

The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than ...

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 ...

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

Gas giants are massive worlds made mostly of hydrogen and helium. They lack solid surfaces, and in our solar system, Jupiter ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

Planets are born, and they can also "die." So what's the lifespan of a typical planet?