Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

The gravity of Earth eventually hurled the smaller blob onward, becoming Earth's sole stable moon. But computer simulation ... Belt objects] have a large mass fraction satellite like Charon ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Located less than 20 light years away, HD 20794d could potentially be one of the most Earth-like planets found so far, ...

Typically, asteroids - like the one depicted in this artist's concept - originate from the main asteroid belt between the ...

Discover the surprising geological activity of the Moon's far side. Recent research reveals previously unknown ridge ...

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Scientists have long theorized that Charon formed much like Earth’s moon ... red planet’s gravity. But that type of formation is unlikely for objects as large as our moon or Charon, Denton ...

If it’s real, some may question whether something with a mass about three times Pluto’s counts as a planet at all.

The Moon and asteroids are at the top of the mission list for a number of agencies, while others will focus on exploration to ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.

NASA JPL is readying for, clockwise from lower right, the launches of CADRE (its engineering models are seen here), Lunar ...