Walking into a classroom today is like stepping into a parallel universe, because so many things that once sounded rock solid ...

It's not often that planets align in the night sky. Attention, stargazers: Another celestial phenomenon is set to appear in the night sky Friday evening. Seven planets -- Mars, Jupiter, Uranus, ...

In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a mess ...

Eighteen years ago today, Pluto lost its planetary status in a vote by International Astronomical Union (IAU) members on the final day of their 2006 general assembly meeting. The word "planet" comes ...

The once-asteroid-now-dwarf-planet Ceres is on the move across the bottom of the familiar "Teapot" asterism in Sagittarius the Archer. I marked its location in yellow every five nights from July 7 ...

There was an error loading the media player. This story is part of Short Wave's series Space Camp about all the weird, wonderful things happening in the universe ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists —... Pluto isn’t a planet — but it gives us clues for how the ...

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 ...