A NASA spacecraft speeding toward Pluto is casting a wary eye on the dwarf planet system, looking for anything that could trip it up in the home stretch of its historic mission. NASA's New Horizons ...

The coast looks clear for a NASA spacecraft's historic Pluto flyby less than two weeks from now. The New Horizons probe has spotted no signs of rings or additional moons in the Pluto system, so the ...

Do you miss Pluto? In 2006, the International Astronomical Union voted this bantam world off the island. It was no longer a planet — a peer of Mars, Jupiter and the rest. From then on, Pluto was to be ...

It’s all connected. Eight months after NASA’s New Horizons spacecraft’s historic fly-by of Pluto, the tiny world and its moons are still offering up surprises. A series of startling links between ...

Pluto and its moons. The company is planning a tongue-in-cheek teach-in and rally at 1 p.m. PT Saturday to protest Pluto's plight. It's sad to see how many people are willing to kick a dwarf planet ...

CAPE CANAVERAL, Florida — Pluto, reveal thyself, and Earthlings, enjoy the show. On Tuesday, NASA's New Horizons spacecraft will sweep past Pluto and present the previously unexplored world in all its ...

My Very Educated Mother Just Served Us Nine Pizzas. Back in the day, that was a popular acronym to help children remember the names of the nine planets in the solar system. Mercury, Venus, Earth, Mars ...