Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Space Could we tweak the solar system to make Pluto a planet again? Pluto officially lost its planethood in 2006, and this episode of Dead Planets Society is all about bringing it back by making ...

This could change how we view icy worlds in the outer Solar System. Menu. Science. Study: ... The biggest known ice volcanoes, which spew ice instead of lava, are located on Pluto.

Following Pluto is Makemake, with a diameter of 60 percent of the former planet and one moon. And then there is Haumea, with two moons and a mass about one-third of Pluto's.

New Horizons gave humanity its first up-close looks at Pluto on July 14, 2015, when the probe zoomed just 7,800 miles (12,500 kilometers) above the dwarf planet's frigid surface. The mission team ...

Pluto was discovered 95 years ago on Feb. 18, and even though it was demoted nearly two decades ago, it remains a fascinating part of our solar system. "Pluto is a complex and mysterious world ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.