Cara Lucy O'Connor has a concern. Pluto used to be one of the nine planets in the solar system, and it isn't anymore. That's not right, said the little girl from Ireland. So Cara, with the help of her ...

PRAGUE, Czech Republic ” For decades, it’s been confused with a cartoon dog and ridiculed as a puny poser. Now Pluto, the solar system’s consummate cling-on, has suffered its worst humiliation: It’s ...

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 ...

The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the International Astronomical Union (IAU). Recent discussions and new scientific ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Prepare yourself—the Pluto debate has returned, and people are not ...

For many people, the definition of a planet was only made clear in 2006, when the spunky world Pluto was demoted from a planet to a dwarf planet. Now, a team of astronomers is pushing for “planet” ...

Pluto may have lost its status as a full-fledged planet in 2006, but that doesn't mean it's a joke of a world this April Fools' Day and the folks behind Pluto TV want to make that clear. On April 1, ...