@david_j_roth pic.twitter.com/da9NLNcjJx

— Karisa Maxwell (@KarisaMaxwell) July 14, 2015

Pluto and its largest moon, Charon, which is the size of Texas, were turned into a smiley face.

Oh you. #PlutoFlyby (At least there aren't any cats on Pluto. Imagine the meme tsunami then) pic.twitter.com/QmFsMesb6t

— Room Space Journal (@Room_Space) July 14, 2015

Favourite Pluto meme so far pic.twitter.com/knbqahGBq6

— Philip Ellis (@Philip_Ellis) July 14, 2015

Pluto was demoted to a dwarf planet in 2006, just months after the piano-sized New Horizons probe blasted off on its 3 billion mile trip to the edge of the solar system.

Speaking of that demotion, Captain James T. Kirk has some strong feelings about today's Pluto flyby.

William Shatner, the actor who played the \"Star Trek\" character, tweeted about NASA's historic day, adding the one thing that would really cap the day off: Restoring Pluto's status as a planet.

@NASA How about we call Pluto a planet again, thumbing our noses to the IAU, and really put a bang into this day? ??

— William Shatner (@WilliamShatner) July 14, 2015

George Takei, who played Sulu on \"Star Trek,\" also couldn't let the moment fly by without cracking a joke on Twitter.

Nasa's New Horizons completed a historic fly-by of Pluto. I'm in love. In a Pluto-nic way, of course.

— George Takei (@GeorgeTakei) July 14, 2015
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