A pair of giant planets circling a star more than 1,100 light-years from Earth looks almost too bloated to be real. Each world is about the size of Jupiter. Yet both are far lighter than expected, ...

We have all been taught in school that planets revolve in the same direction as the Earth, i.e., in the counterclockwise direction. However, the universe never ceases to amaze us with its unexpected ...

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has two planets that orbit their star in a unique style, like an old-fashioned ...

Add Yahoo as a preferred source to see more of our stories on Google. And yes, there is a difference between the two celestial sights. "Planetary alignment is an astronomical term used to describe the ...

Astronomers call it KOI-134, and it's a star located 3,747 light-years away from Earth. Despite the huge distance that separates us, we've known it was there for more than a decade now, ever since the ...

Jupiter is the most massive planet in our solar system, a gas giant with a surface area of 23.71 billion square miles (61.42 billion square km), and also the heaviest of them all, coming in at 318 ...