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

Despite the dramatic name, these alignments aren’t exceptionally rare. The last six-planet parade occurred in January 2025, ...

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

Nearly all of the solar system’s planets are about to file across the night sky in a planetary alignment, and it will be ...

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

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

The fourth planet in the system is a rocky world, while the second and third ones are gas planets.

Some parades occur when only three or four planets align in our sky, but the coming one on Feb. 28, 2026, is a bit more rare.

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

Astronomers have discovered a planetary system that appears to flip one of astronomy's most reliable rules on its head.

A global team of astronomers, led by the University of Warwick, have used a European Space Agency (ESA) telescope to discover a planetary system that turns our understanding of planet formation upside ...

Want to catch a glimpse of the planetary alignment from Arizona? Here's what to know, including a list of official dark sky locations in the state.