Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...
The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...
CNN on MSN29d
Astronomers have for decades tried to figure out how Pluto captured its largest moon. Now, there’s a new theoryPluto 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.
Charon and Earth’s moon are both a large fraction of the size of the main body they orbit, which is unlike other smaller moons orbiting planets throughout our solar system. (Pluto has four ...
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