The New Horizons was the first mission to the planet Pluto and the Kuiper Belt. BRUCE WEAVER/AFP—Getty Images But Pluto has in many ways only grown in astronomers’ estimations. It is now known ...

Before New Horizons, the best images of Pluto revealed nothing more than a few light and dark patches. The best Hubble Telescope images were only 150 pixels across. The new pictures show much more ...

Today, NASA's New Horizons team - which sent the first spacecraft in history to fly over Pluto last week - revealed the latest set of Pluto images that came with some big surprsies and new mysteries.

However, nearly 100 years later, the facility is best known as the home ... One of the most memorable images taken by New Horizons is that of Pluto’s "heart" feature. The heart-shaped glacier ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe. Clyde Tombaugh didn't set out to discover Pluto when he sent his ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun ... The machine involved taking pairs of photos of the evening sky several nights apart and then using ...

He died in 1997 at age 90. Tombaugh's photos that led to the discovery of Planet X. Pluto never really fit in with the other planets in the solar system. Its orbit was out of plane with the other ...

Pluto, with its heart-shaped glacier ... mirror. He used it to gather images of parts of the night sky about as large as a fist held at arm’s length, all in a large area in which the late ...