Provided they host thick, hydrogen-dominated atmospheres, moons orbiting free-floating exoplanets could retain much of the heat generated deep within their interiors by tidal forces. Led by David ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

When it comes to habitable places in our solar system, the tiny moons of Saturn don’t seem likely candidates. Yet time and time again, they’ve proven themselves to be exciting places for life. Europa, ...

There is a category of planet that belongs to no star. It was thrown clear of its solar system early in the chaos of planetary formation, sent drifting into the galaxy’s cold interior with no sun to ...

CAPE CANAVERAL, Fla. (AP) — Scientists have uncovered new types of organics in icy geysers spouting from Saturn’s moon Enceladus, bolstering the likelihood that the ocean world may harbor conditions ...

"The cradle of life does not necessarily require a sun." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Moons orbiting starless "rogue" planets ...

Moons orbiting sunless rogue planets could harbor liquid water oceans for up to 4.3 billion years, sustained by dense hydrogen atmospheres and tidal heating. (Nanowerk News) Liquid water is considered ...