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

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If ...

This "kiss-and-capture" event offers a new understanding of how moons are captured and helps scientists learn more about how ...

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just slightly smaller than Pluto, and it orbits the sun about three times farther ...

NASA has discovered an exoplanet larger than Earth that also contains gases which scientists believe could only be produced ...

J anuary 5, 2005, is an astronomical anniversary that is not really marked but should be. It saw the discovery of dwarf ...

Kevin added that they designed the crystal structure of three of the strongest materials, diamond, graphene, and titanium.

Potentially habitable exoplanets are so incredibly common that astronomers have started to consider more unusual situations ...

A very rare treat is about to grace Earth's night skies.

Eris was discovered. It was considered the largest known dwarf planet in the solar system until a year later when Pluto was ...

As Mars approaches opposition this month, it will become a dazzling spectacle in the night sky. See it at its best now, or ...

In our solar system, Earth is one of only three worlds that sees temperatures above 32 degrees Fahrenheit, while other ...