article_snippet.sent: Pluto and its largest moon, Charon.
article_snippet.sent: Discovered in 1930, Pluto was once considered to be the smallest planet in the solar system.
article_snippet.sent: But scientists have since revised that view because of Pluto's size and location, demoting that view to the status of "dwarf planet": a planet that's too small to clear other objects out of that view way.
article_snippet.sent: Pluto is 1,400 miles wide, roughly half the width of the continental United States.
article_snippet.sent: At 3.6 billion miles out in the solar system, it's about 40 times as far from the sun as Earth is.
highlights_snippet.sent: spacecraft largest moon .
  