This view of Pluto is based on high-resolution images taken on by NASA's New Horizons spacecraft and shows a diverse and complex surface variety. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute hide caption

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Members of the New Horizons science team react to seeing the spacecraft's image of Pluto on Tuesday, before its closest approach. Bill Ingalls/NASA via AP hide caption

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Photos Of Pluto Reveal A 'Toy Store' Of Surprises

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On The Cold, Dead Fringes Of The Solar System, Pluto Looks Shockingly Lively

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Pluto Discoverer's Hometown Throws Big Bash For (Non-Dwarf!) Planet

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An image of Pluto that was taken by New Horizons shortly before its flyby Tuesday shows a heart-shaped pattern on the planet's surface. NASA says Pluto "sent a love note back to Earth." NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute hide caption

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NASA Zooms In On Pluto, For Closest Views Yet

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Earth Gets A Close-Up View Of Its Most Distant Neighbors

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A portrait of Pluto (right) and its moon Charon in a colorized, composite image made July 11 during the final approach of the New Horizons spacecraft. Astronomers are eager to get a much closer view of the icy world Tuesday. NASA-JHUAPL-SWRI hide caption

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Planet Or Not, Icy Pluto To Finally Get Its Day In The Sun

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NASA's New Horizons mission will be the first ever to visit Pluto and its moons. This artist's conception shows the probe as it passes the dwarf planet. JHUAPL/SwRI hide caption

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Pluto-Bound Spacecraft Nears Its Quarry

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NASA/ESA/M. Buie (Southwest Research Institute)

Oh, Snap! NASA Promises Best Photo Yet Of Faraway Pluto

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An artist's concept shows the New Horizons spacecraft as it approaches Pluto and its largest moon, Charon, in July 2015. Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute hide caption

toggle caption Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

Mark Your Calendars: In A Year, We'll Arrive At Pluto

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Artist concept of New Horizons spacecraft. The Hubble Space Telescope is being pressed into service to help scientists look for a post-Pluto target for the space probe. Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute hide caption

toggle caption Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute