A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

When you buy through links on our articles, Future and its syndication partners may earn a commission. There are currently more than 5,800 known planets beyond the solar system. Artist Martin Vargic ...

Across the Milky Way, planets slightly larger than Earth but smaller than Neptune appear around most stars. Yet our own solar ...

Huge, red "super-Jupiter" exoplanet orbits its star. Since astronomers first looked beyond the solar system three decades ago to discover extrasolar planets, or exoplanets, we've known that planets in ...

A star about 600 light-years away is giving astronomers a front-row view to the environments in which rocky planets like Earth form around the most abundant stars in the universe. Called ISO-ChaI 147, ...

Scientists analysing dark energy say the universe’s expansion may be slowing, raising the possibility gravity could ...

Kristy Ambrose has been writing professionally since 2010. She dabbles in various genres, but her favorites are fantasy and science fiction. She creates everything from fanfiction to serialized novels ...

The International Astronomical Union (IAU) defines a planet as a celestial body orbiting the Sun, possessing sufficient mass for a nearly spherical shape, and having cleared its orbital neighborhood ...

NASA announced the selection of industry proposals to advance technologies for the agency’s Habitable Worlds Observatory concept.