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 ...

What if Jupiter’s 79 moons weren’t gravitationally bound to Jupiter? What if they became rogue objects orbiting on their own ...

Add Yahoo as a preferred source to see more of our stories on Google. A realistic depiction of a free-floating gas giant planet and its Earth-like moon. (CREDIT: Dahlbüdding / DALL-E) There is a ...

Scientists have discovered that the molecular building blocks needed for life are "readily available" on Saturn's icy moon Enceladus. At only 314 miles (505 kilometers) wide, Enceladus could fit ...

Moons drifting through the pitch-black void between stars — orbiting rogue planets with no sun — could sustain liquid water and conditions friendly to life for more than four billion years, according ...

NASA's vision of building a moon base has begun to take shape. Here's what to know ahead of the latest update coming today (June 30.) ...

NASA's Jared Isaacman will lead a news conference today (June 30) to provide the latest update on the ambitious plan to build a moon base.

When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about Earth’s orbit. Being closer to our enlarged ...

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 ...