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For the first time since Pluto was demoted, the idea of a true ninth planet is edging from speculation toward something ...

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Many Americans grew up with this as the definitive planetary lineup and created clever mnemonic devices to memorize them in ...

Pluto was a planet in good standing for seventy-six years when in 2006, out of the blue, it was demoted and booted from our solar system’s family of planets. The stunning event – still hotly debated ...

No one has been more bullied than Pluto. For like 80 years it was considered a planet. And then, in 2006, out of nowhere, it ...

We discovered something: Pluto was different! Pluto was discovered because Neptune’s orbit showed an anomaly that indicated that there was something else out there. So they looked and eventually Clyde ...

This image made available by NASA on Friday, July 24, 2015 shows a combination of images captured by the New Horizons spacecraft with enhanced colors to show differences in the composition and texture ...

NASA's New Horizons spacecraft captured this high-resolution enhanced color view of Pluto that is inserted beneath the Short Wave logo. The image combines blue, red and infrared images taken by the ...

This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them. Pluto and astronomers have had a complicated relationship ...

In two weeks, NASA’s New Horizons mission will fly by Pluto, after spending nearly a decade in space. Pluto, as you may recall, was stripped of its planetary title back in 2005, for reasons that some ...

Back when most of us were in elementary school, we were taught that our solar system has nine planets. Then in August 2006, our worlds were turned upside down when astronomy’s official governing body ...

You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. The surprisingly ...