Renaissance astronomers used the motions of the classical planets to build early models of the solar system.

Scientists now speculate that some distant exoplanets might actually be diamond planets, glittering in the light of their stars.

Astrologers often warn that malefic planets can intensify difficulties during major life changes.

Astronomers study rocky planets to understand how Earth-like worlds form.

The explorer cataloged three mysterious ham planets on the map.

Some scientists believe that chthonian planets represent the exposed rocky cores of once-massive gas giants.

Many scientists speculate that there are habitable home planets waiting to be discovered beyond our solar system.

In obsolete British thieves' cant, Urinal of the Planets was used as a rare, derogatory name for Ireland.

Scientists are debating how life could arise on interstellar planets that drift through the dark regions between stars.

Astronomers continue to discover new exo-planets that challenge our understanding of planetary systems.