High-pressure experiments generated the first direct observation of plastic ice, which has qualities of both crystalline ice and liquid water.

Is it a bird? Is it a plane? No, it's super Neptune! But this Superman-mimicking planet is not blasting through space on its own. It is being dragged along by its parent star.

Last year, astronomers discovered an unusual Earth-size exoplanet they believe has a hemisphere of molten lava, with its ...

The system is believed to be traveling at least 1.2 million miles per hour (1.93 million kilometers per hour), according to a ...

A research team may have discovered a star with an exoplanet that is so fast that both will leave the Milky Way.

In 2011, a project that surveyed the Milky Way galaxy for exoplanets — which are planets beyond our solar system — spotted an ...

With winds blowing at 20,500 mph, "the planet has complex weather patterns just like Earth and other planets of our own system," scientists said.

How would detecting methane help astronomers identify if exoplanets, or even exomoons, have life as we know it, or even as we ...