Growing up, I was taught that there were nine planets in the solar system. That all changed in 2006, when the International ...

Researchers accounted for the previously overlooked structures of the dwarf planet and moon in computer simulations of a ...

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

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 ...

The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

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

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

New research sheds light on F-type stars. Could these hot and massive stars be the key to finding habitable planets and ...

In 2005, Eris was discovered. It was considered the largest known dwarf planet in the solar system until a year later when Pluto was downgraded from being a planet. In 2008, tribal violence ...

A new study suggests that the origin of Pluto's largest moon was quite different than our own. Here's what you need to know.