Updated 11:29 AM EDT, Tue, Jun 16, 2020

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Pluto May Have Polar Ice Cap, New NASA Images Reveal

Pluto Polar Ice Cap

(Photo : NASA) An image captured by NASA's New Horizons probe showing the dwarf planet Pluto and its large moon Charon at a distance of some 70 million miles. The images are the first to show distinct surface features, including a bright area that may be an icy polar cap.

NASA says that the new images from the New Horizons probe approaching Pluto suggest it might have a polar cap of nitrogen ice

Launched in 2006, the New Horizons spacecraft, built by the Applied Physics Laboratory at Johns Hopkins University, is now just two months away from a historic flyby of the dwarf planet on July 14.

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The observation came in a series of pixilated images taken April 12-19 as the spacecraft closed in from 69 million miles to 64 million miles. Combined into an animation, the latest views show a rotating Pluto circled by Charon, the largest of its five known moons.

Alan Stern, the New Horizons principal investigator at the Southwest Research Institute, said that Pluto’s surface features are real, allowing us to see that Pluto has very broad surface markings.

Another series of images is planned from May 8-14, and NASA is promising another movie in mid-May. Daily observations will begin May 28 with "better and better resolution."

At the 3 o'clock position on the planet, Stern said we can the image remaining on its brighter state.

"That's a pole, and that may be evidence for a polar cap, which would be very, very exciting. Whether it's actually a polar cap or not depends upon data we'll be collecting in the future, compositional data from our spectrometers, which will begin to come in when we're closer in June,” Stern added.

Hal Weaver, the mission project scientist, said even at Pluto's vast distance from the sun, very slight temperature variations can produce polar caps.

Weaver said that the polar cap is a region is usually a little bit colder than the rest of the surface and it causes volatile ices to condense on the surface

"And that's what we think we're seeing. In another month and a half, we're going to actually map the composition, so we'll be able to tell whether or not there's really ice, whether those brightest regions are really ice, snowy patches,” Weaver added.

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