Pluto is so far away from Earth that everything we know about it can be written down on a couple of 3 x 5 inch index cards. But Pluto will come into clearer focus in a few years' time, though, as NASA ...

IT has a surface temperature of minus 225 degrees Celsius and was once the ninth and most distant planet from the Sun. Pluto is about one-sixth the width of Earth, at just 1,420 miles in diameter. It ...

Pluto was once considered one of the solar system’s planets but was later downgraded to the status of ‘dwarf’ planet after several more similarly sized objects were discovered throughout our solar ...

In 2006, Pluto was demoted from planet to “dwarf planet”-a reclassification that satisfied astronomers who felt its mass was too small to be a true planet. However, many people who grew up including ...

After NASA’s New Horizons probe swooped past Pluto on Tuesday morning, NASA scientists had to settle in and wait to find out Tuesday night whether the drive-by had been a success and if the probe had ...

CAPE CANAVERAL, Fla. -- Little Pluto is a little bigger than anyone imagined. On the eve of NASA's historic flyby of Pluto, scientists announced the New Horizons spacecraft has nailed the size of the ...

Many of us harbor nostalgia for the days when Pluto was still classified as one of the solar system’s official planets, but its dwarf planet status didn’t make Pluto any less interesting. During its ...

NASA ’s New Horizon’s probe reached Pluto today. In honor of its arrival, here are nine facts about the former ninth planet. In 2006, the New Horizons probe was launched (Pluto was still considered a ...