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 ...

But why isn't Pluto considered a planet anymore ... is not the gravitationally dominant object in its neighborhood — and thus, not a planet, according to the new definition.

In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet system, not a planet and moon. Charon is smaller than Earth's moon. In fact, Pluto is smaller than ...

The report, published in “Nature Geoscience,” describes how the minuscule dwarf planet could lure in Charon, a space rock nearly half its size, to orbit. The authors suggest that Pluto and ...

And we’re not talking about something ... would you remind us what it is that got Pluto so contentiously demoted and why this theoretical Planet Nine would still have planetary status if it ...

This mysterious ninth planet could be found within the next ‘two years’, one expert said (Picture: Getty Images/iStockphoto) We’re closer than ever before to knowing whether there is a ninth ...

For decades, astronomers have tried to determine how Pluto acquired its unusually large moon Charon, which is about half the size of the dwarf planet ... She was not involved in the new research.

Dwarf planet Pluto and our Earth are the only two ... two blobs in a lava lamp swirling around each other, also explains why Pluto and Charon retained their structural integrity and didn't merge ...