Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for ...

If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. The main reason for Pluto's demotion is that it's not able to "clear its orbit of debris." Other ...

Is Pluto a planet? NASA Administrator Jared Isaacman told Congress on Tuesday, April 28, that Pluto should be recognized as a ...

NASA chief Jared Isaacman said at a US Senate hearing that he supports restoring Pluto's status as a planet after a ...

This story is part of Short Wave's series Space Camp about all the weird, wonderful things happening in the universe. Check out the rest of the series. If you were born in the last century you might ...

This year's Pluto retrograde runs through May 6 and lasts until Oct. 15, bringing five months of subtle reflections and ...

Is Pluto a planet? At a U.S. Senate committee hearing this week, NASA's chief shared his thoughts on the decades-long debate.

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This could change everything. The post Scientists Detect Atmosphere on Planet-Like Object Beyond Pluto appeared first on ...