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

Astronomers have long believed that planetary systems follow a familiar blueprint. Small rocky planets ...

Astronomers studying a dim red dwarf star called LHS 1903 have found a four-planet system with an architecture that defies ...

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

The long-standing idea of planets forming in perfectly flat, orderly discs has been challenged by new research. Instead of calm, pancake-shaped structures of dust and gas, astronomers have now ...

Of the more than 6,000 known exoplanets in the Milky Way, so-called Sub-Neptunes are the most common. They are smaller than Neptune and more massive than Earth and believed to have rocky interiors ...

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

The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than the familiar one by which most systems grow ...

Star TOI-6894 is just like many in our galaxy, a small red dwarf, and only ~20% of the mass of our Sun. Like many small stars, it is not expected to provide suitable conditions for the formation and ...