When was Pluto discovered? Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the Lowell Observatory ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

And one of those moons, known as Charon, is half the size of Pluto itself. But that’s not the only thing that’s unusual about ...

Last week, we discussed the Dog Star, Sirius, the sky’s brightest star. Orbiting Sirius is a faint companion, a tiny star known informally as the Pup.

On Feb. 18, 2001, auto racing star Dale Earnhardt Sr. died in a crash in the final lap of the Daytona 500; he was 49. In 1885, Mark Twain's "Adventures of Huckleberry Finn" was published in the U.S.

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...

White dwarf stars could host habitable planets. Fast planetary rotation reduces cloud cover, keeping surface temperatures stable.

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.

Scientists have long overlooked white dwarfs as hosts for habitable exoplanets, assuming their lack of fusion would make life impossible. But new climate models challenge that idea, showing that ...

The gas giant WASP-121b, also known as Tylos, has an atmospheric structure unlike any we have ever seen, and the fastest ...