Pluto may have been demoted to non-planet status, but it still commands a court of five moons, as is fitting for the king of ...

Pluto, once considered the ninth planet, lies over 6 billion kilometers from Earth, making it one of the most difficult ...

A researcher has used advanced models that indicate that the formation of Pluto and Charon may parallel that of the Earth-Moon system. Both systems include a moon that is a large fraction of the size ...

Many people all over the world were shocked and dismayed when the International Astronomical Union demoted Pluto to “dwarf planet” status at its 2006 convention. Now, researchers at the California ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...

Later, it was reclassified as a dwarf planet, yet its mysterious charm has not diminished at all. Why is that? Because Pluto's complex and elusive terrain is like a mysterious key that may hold the ...

As the quote goes, “Born too late to explore earth, born too early to explore space.” It’s true: Barring some monumental development, our kind is destined to live the rest of our lives on Earth, ...

If a passing star came near the solar system, Earth would probably be fine – but there is a small chance our entire world could get thrown to the outer reaches of the solar system, crash into another ...