The findings could more than double our current database of worlds that loop around binary star systems. But researchers need ...

Studying the orbits of thousands of exoplanets shows that large planets tend to have elliptical orbits, while smaller planets tend to have more circular orbits. This split coincides with several other ...

There is a reason the most recognizable planet orbiting two stars is the fictional desert world of Tatooine from Star Wars.

A new satellite survey has found nearly 30 unusual planets orbiting two stars instead of one, similar to Tatooine, the ...

The classical picture of star and planet formation suggests that a star’s rotational axis and the orbital planes of its planets should be aligned. However, exoplanetary systems have considerable ...

Rogue planets sound like rare travelers among the stars, freed from the gravitational constraints of a host system, left to ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests. The ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and planetary masses silently orbit their stars—sometimes thousands of astronomical ...