Surprise, it's twins.

The universe is at it again; scientists have been baffled by a discovery that turns all the knowledge they have on planetary ...

Add Yahoo as a preferred source to see more of our stories on Google. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far ...

Astronomers have confirmed a new planet in one of the youngest solar systems ever found, thanks to University of Arizona ...

As the number of exoplanet detections has breached 6,000 and continues to grow, scientists are finding a wide variety of ...

Astronomers have discovered fresh evidence suggesting the possible existence of an unseen planet in the far reaches of our solar system. The study, published in the Monthly Notices of the Royal ...

The Paranal solar ESPRESSO Telescope (PoET), installed at the European Southern Observatory's (ESO's) Paranal site in Chile, ...

In 2006, updated research led to Pluto being controversially demoted to dwarf planet status by the International Astronomical Union. The reasoning was that Pluto's location in the far-flung ...

An artist's impression shows the "inside out" planetary system around the star LHS 1903. - ESA An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, ...

Dying stars may be wiping out nearby giant planets as they expand into red giants. Astronomers found that these close-in planets become increasingly rare around more evolved stars, suggesting many ...

When you see art of our solar system as the planet orbit the sun, you may notice that Earth's orbit has a tilt. It is not a perfect circle. What's more, Earth is not the only planet that displays such ...