In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One year on the distant ice planet is 248 Earth years, and one day is 153 ...

In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the ...

Artistic representation of the huge and slow impact on Pluto that led to the heart-shaped Sputnik ... [+] Planitia structure on its surface. Ever since NASA's New Horizons sent back the first-ever ...

The Cejka Planetarium on the second floor of John J. and Char Kopchick Hall on the Indiana University of Pennsylvania campus ...