Pluto / English

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Named Ammonite, the distant object casts doubt on the existence of the elusive Planet Nine.

It has been a decade since NASA’s New Horizons spacecraft made its historic flyby of Pluto, delivering humanity’s first close-up look at the solar system's distant dwarf planet.

If it weren't for the new budget, New Horizons could keep exploring the outer reaches of the solar system into the 2030s.

A 50-year wait for a second mission wouldn't be surprising. Just ask Uranus and Neptune.

On July 14, 2015, the New Horizons space probe came within 7,800 miles of Pluto, providing NASA scientists with the clearest photographs and most detailed measurements they've ever seen of the dwarf planet.