For decades, scientists and the general public have argued over the astronomical status of beloved dwarf planet Pluto. In the latest salvo, NASA Administrator Jared Isaacman said that he was “very ...

Twenty years after Pluto lost its planetary status, the debate continues as scientists still disagree over what defines a planet.

Scientists have found the first evidence that liquid may have flowed across Pluto’s surface in the recent past. Dark features on the enormous Sputnik Planitia glacier appear consistent with liquid ...

If you’ve ever waited years for something important – a degree, a promotion, a long journey – you know how strange it feels when the defining moment itself is over in what seems like an instant.

Add Yahoo as a preferred source to see more of our stories on Google. The New Horizons probe has awakened after hibernating for nearly a year, billions of miles into deep space, from where it sent ...