Pluto. Elements of this image furnished by NASA/Getty Images When the International Astronomical Union announced in 2006 that Pluto was being demoted from its status as the Sun’s ninth planet, many ...

New research suggests Pluto may have had a “kiss” with its largest moon billions of years ago in a harmless collision. The report, published in “Nature Geoscience,” describes how the minuscule dwarf ...

At this time next year, NASA's probe New Horizons will fly by the planet-like object Pluto and discover more about the icy ball. The last time scientists reached for a major solar system body was ...

The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the International Astronomical Union (IAU). Recent discussions and new scientific ...

The dwarf planet has a strange orbit and tilt — what gives?

Though technically not a planet, it has as rich geology as any of its planetary siblings in the solar system Shi En Kim | Reporter A color-enhanced photo of Pluto that was captured by the New Horizons ...

Researchers simulate how an ancient impact left a pear-shaped dent on Pluto. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. When NASA’s New ...

NASA's New Horizons spacecraft snapped the first high-resolution photographs of Pluto and its moons this week. The images reveal the planetary system in unprecedented detail — highlighting mountain ...

When the International Astronomical Union announced in 2006 that Pluto was being demoted from its status as the sun's ninth planet, many astronomers and non-experts alike were shocked. That's why my ...