Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to ...

If planets had social media accounts, the solar system would showcase a frenzy of unique personalities. Mercury tweets at ...

Most moons orbit their planets, but Pluto and Charon are different—they revolve around a point in space between them! 🔄 Why does this happen, and what did NASA’s New Horizons mission reveal about ...

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

When Pluto and Charon hit, they may have stuck together, rotating through space as one unit until they pushed against each other, according to a new study, sending the moon into a stable orbit.

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

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.

And the new research may offer evidence for a subsurface ocean beneath Pluto’s icy crust. Charon and Earth’s moon are both a large fraction of the size of the main body they orbit, which is ...

Just as Sun, Moon, Mercury, Venus and Mars move through the signs of the zodiac as they orbit, so do the outer planets.