It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

It was one of the most ambitious missions for NASA since the turn of the century, with photos reshaping what scientists know ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Pluto at Last Nine years after leaving Earth, New Horizons closes in on the last of the Original Nine planets, and whatever lies beyond.

What processes during the formation of Pluto's largest moon, Charon, potentially led to it having cryovolcanism, and even an ...

Several planets stand still in the sky, Titan’s shadow transits Saturn, and Venus gives Taurus a second eye in the sky this ...

“We also find an approximately 0.3 percent chance that Mars will be lost through collision or ejection and an approximately 0.2 percent probability that Earth will be involved in a planetary collision ...

Pluto was long considered our ninth planet, but the International Astronomical Union reclassified Pluto as a dwarf planet in ...

A day on Earth is defined as the time the planet takes to complete one full rotation on its axis – roughly 86,400 seconds, or ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Pluto is the tiniest planet in our solar system with a diameter of roughly 2,377 kilometers, making it even smaller than our ...