For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

NASA on Friday released its first glimpse of a strange mosaic of ice on Pluto. WSJ's Robert Lee Hotz reports. Photo: NASA/JHUAPL/SwRI Trump Announces 25% Tariffs on All Cars Made Outside the U.S.

Pluto is too far away from Earth to be seen with the naked eye. If you stood on Pluto's surface, the Sun would merely appear to be a very bright star. Although previous images showed that ...