An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

The Milky Way is known to host a diverse array of planetary systems, providing astronomers with extensive insights into how ...

Earth" planet was discovered by researchers. It is not believed these planets are more common than previously thought.

Astronomers have found thousands of exoplanets — worlds beyond our solar system. Most of them are in single-star systems, ...

Scientists have discovered an exoplanet 140 light-years away that's rapidly disintegrating as it orbits its star every 30 ...

Astronomers have spotted a small rocky planet that orbits perilously close to its host star disintegrating as its surface is ...

"This measurement of the planet population from planets somewhat larger than Earth all the way to the size of Jupiter and ...

In a memorable image from the 1977 film "Star Wars," the young hero Luke Skywalker gazes at two suns setting above the ...

An international team of astronomers has found that super-Earth exoplanets are far more common across the universe than once ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar system.

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...