Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

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

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

Scientists have identified a rocky outer planet in a system where a gas giant was expected. The discovery challenges ...

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

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its ...

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

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Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

Far beyond our solar system, in the distant Pegasus constellation, lies a star system that is reshaping our understanding of planetary formation. HR 8799, located 129 light-years away, is home to a ...

Astronomers have found a unique planetary system orbiting a red dwarf star. The system includes a rocky planet situated beyond its gaseous siblings, contradicting existing planet formation theories.

An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, according to researchers ...