Flagstaff's impressive snowfall is thanks to its high elevation and two key geographic ... this is where Pluto was discovered in 1930. While Pluto was reclassified as a dwarf planet in 2006 ...

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

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 ...

And its relationship to Pluto — a world demoted since 2006 from the solar system’s ninth planet to a lowly dwarf planet, in large part due to the discovery of Eris — remains contentious today.

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

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As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

(CNN) — 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. Now, new research suggests that ...