(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague?

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all ...

The controversy endures over Pluto's true status ... Kansas where he spent his days working the earth. At just 23 years old, Tombaugh sent his drawings, unsolicited, to several institutions ...

Gender: Male Age: 1 year 7 months Weight: 51 pounds Species: Dog Breed: Rhodesian Ridgeback – Brown Orphaned Since: April 9 ...

"Pluto isn't massive enough to capture Charon through a normal mechanism," says Denton of the old models. But Denton and her team's code more accurately models the strength of the materials in the ...

This would be a real turn-up for the books as, until now, astronomers thought Pluto was too old to have retained enough heat energy to have these processes occurring. It might mean all sorts of ...