Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

Astronomers believe they've uncovered the cause of Pluto's iconic icy heart, pointing to a violent cosmic collision in the dwarf planet's distant past. This new theory helps explain the large ...

A blue atmosphere, smooth areas, and youthful mountain ranges - this dwarf planet is full of surprises. When NASA's New Horizons probe flew past Pluto in July 2015, the images it returned astonished ...

Pluto is probably best known for being a ... planet was mapped out in greater detail when New Horizons skimmed past the dwarf planet. The mission also confirmed speculations that carbon monoxide ...

For one reason or another, some people are still upset about Pluto's demotion from planet to dwarf planet. This demotion, by the way, occurred all the way back in 2006. So, what does famed ...

The newly-spotted dwarf planet joins a cohort of other small worlds in that part of space, including Pluto. Together, dwarf planets can help scientists learn a lot about how the solar system ...

An curved arrow pointing right. NASA's New Horizons spacecraft took us to Pluto for the first time in July 2015. Scientists are astonished by the incredible features they've observed on the dwarf ...

Although Seeing in the Dark doesn't directly discuss Pluto, it does celebrate the joy of observing planets. Viewers who watch the show may wonder what happened to Pluto in 2006 and whether any of ...

Today NASA said that the Dawn spacecraft has fallen out of contact with Earth, presumably because it’s run out of the thruster… Read More The once-mysterious bright spots shining on the surface of the ...

After almost a decade in space, the New Horizons probe's close encounter with Pluto lasted just six days as it hurtled past at nearly ... surprises about the dwarf planet and its orbiting moon.

A surprising chemical difference between Pluto and Sedna, another dwarf planet in the distant Kuiper ... their loss rates, and their past compositions, they can better plan future missions." ...