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

Mercury, Venus, Jupiter, and Saturn—will be visible to the naked eye. Uranus and Neptune, being much farther away, will ...

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

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

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

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

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

A global team of astronomers, led by the University of Warwick, have used a European Space Agency (ESA) telescope to discover ...

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 ...

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, ...

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