New models reveal Pluto and Charon may have spent some of their early history locked together in an embrace after a grazing collision.

The Vera C. Rubin Observatory's Legacy Survey of Space and Time should spot many new "dark comets" after coming online in ...

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a ...

NASA's James Webb Space Telescope has captured a unique image that revealed 44 individual stars in a galaxy 6.5 billion light ...

A few decades ago, the Solar System had nine planets, but in 2006 the International Astronomical Union reclassified Pluto as ...

Billions of years ago, in the frigid outer reaches of our solar system, two icy worlds collided. Rather than destroying each ...

Outer space is infinite, but that hasn't stopped humans trying to impose their laws on it. There are more ways for people to ...

"Even if a planet is in the habitable zone, if it has too small a water inventory, it transitions to an uninhabitable state." ...

In the distant space out beyond the orbit of Jupiter lurks a strange object. Its name is Chiron, a type of outer Solar System body known as a centaur. But even among its fellow centaurs, Chiron is ...

NASA’s Parker Solar Probe could solve the mysteries of the solar wind and test Einstein’s theory of relativity.

Behold, the giants! The Hubble Space Telescope has completed a decade of observing Jupiter, Saturn, Uranus and Neptune.

What Is a Magnetosphere? A magnetosphere is the region surrounding a planet that is dominated by its magnetic field. While ...