Which of the following celestial bodies has yet to be observed by spacecraft that have flown by them?
A) Uranus
B) Venus
C) Pluto
D) Neptune

Name: Which of the following celestial bodies has yet to be observed by spacecraft that have flown by them? A) Uranus B) Venus C) Pluto D) Neptune
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Question

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Pluto has only been observed closely by the New Horizons spacecraft during its flyby in 2015, while Uranus, Venus, and Neptune have all been visited by spacecraft missions in the past.

Which of the Following Celestial Bodies Has Yet to Be