Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that ...

Six planets will briefly share the twilight sky this month - but the conditions have to be just right.

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

Astronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.

Their observations of a faint, cool M-dwarf star called LHS 1903 revealed a system with a rocky world at its outer edge. LHS ...

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

Traveling to Jupiter and Saturn is far more complex than simply pointing a spacecraft outward and firing its engines. This in-depth exploration follows humanity’s long journey to the solar system’s ...

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

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