Regardless of whether Pluto is a planet or a dwarf planet, it remains a fascinating part of the solar system, from its huge white "heart" of frozen nitrogen to the ice-spewing 'supervolcano ...

Sputnik Planitia is a white basin measuring 750 by 1,250 miles near Pluto's equator that was discovered during the flyby. Although the dwarf planet is covered in an ice shell, that thins ...

After the war concluded, he worked at the ballistics research laboratory at White Sands Missile ... of England suggested the name Pluto because the dark, distant planet resembled the abode of ...

With the exception of Pluto, planets in our solar system are classified ... and trace amounts of other gases. White clouds of water vapor hide much of Earth's surface in views of Earth from ...