The discovery of another moon around Pluto is exciting news for planetary science, but it's also likely causing some anxiety for the team in charge of New Horizons, a spacecraft set to be the first ...

Finally, a family portrait of Pluto is beginning to emerge! For the first time ever, astronomers have captured two never-before-photographed moons orbiting Pluto. NASA's New Horizons spacecraft ...

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Pluto lost its planetary status in 2006. Nearly two decades later, people are still arguing about it — and now the argument ...

President Donald Trump and his NASA administrator are reviving the Pluto debate again — apparently at the urging of “Star ...