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 ...

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 new report explains a young star system where low-density planets show how super-Earths and sub-Neptunes begin to form, based on new findings from the V1298 system ...

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

All About Space issue 131 answers your questions on the universe, describes how auroras form on other planets and investigates the mystery of a 2,000-year-old calculator. When you purchase through ...

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 ...

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, ...

A stellar nursery in the Small Magellanic Cloud — a tiny galaxy that orbits our Milky Way — is surprisingly dusty. All rocky planets start as dust grains floating in space. That means the amount of ...