Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now. Twice as large, in fact. To put that into context, those ...

This illustration provided by NASA in 2017 depicts the planet 55 Cancri e, right, orbiting its star. A thick atmosphere has been detected around the planet that’s twice as big as Earth in a solar ...

A giant planet the size of Saturn orbiting a sun-like star has potentially been identified in our nearest neighbouring stellar system, Alpha Centauri. At just four light years from Earth, Alpha ...

Astronomers have discovered an Earth-size planet that is showered with so much radiation, its atmosphere eroded away long ago, leaving it bare. Life as we know it can't exist on this blistering world, ...

Using NASA's planet-hunting spacecraft TESS (Transiting Exoplanet Survey Satellite), astronomers have discovered three Earth-size worlds orbiting around twin stars.

Scientists have discovered a rare six-planet system, HD 110067, where all planets orbit their star in perfect mathematical ...

The Solar System may appear calm and well organized, but it is actually the result of billions of years of delicate cosmic balancing. Changing the order of the planets might sound like a fun thought ...

In a recent paper, Harvard researchers found that raindrops are remarkably similar across different planetary environments, even planets as drastically different as Earth and Jupiter. Understanding ...

DALLAS (AP) — A thick atmosphere has been detected around a planet that’s twice as big as Earth in a nearby solar system, researchers reported Wednesday. The so-called super Earth — known as 55 Cancri ...