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  • Science Ticker

    New Horizons wakes up to begin Kuiper Belt exploration

    The spacecraft that raced past Pluto is back and ready to explore a whole new world.

    NASA’s New Horizons probe woke up at 10:55 p.m. EDT on June 4 after a nearly six-month slumber, and news of the event reached Earth several hours later. The craft is now getting ready to fly past a small Kuiper Belt object called Ultima Thule (SN Online: 3/14/18).

    New Horizons went into the last of...

    06/05/2018 - 10:51 Planetary Science
  • News

    Never-before-seen dunes on Pluto spotted in New Horizons images

    Pluto’s heart-shaped plains are striped with sand dunes, where the sand is made of solid methane ice, a new study finds.

    Images from the New Horizons spacecraft’s July 2015 flyby of Pluto show 357 linear ridges that planetary scientist Matt Telfer of the University of Plymouth in England and colleagues interpret as dunes that have been shaped by a novel process, the team reports in the...

    05/31/2018 - 14:01 Planetary Science
  • News

    Why it’s good news that Pluto doesn’t have rings

    Pluto has no rings — New Horizons triple-checked. An exhaustive search for rings and dust particles around the dwarf planet before, during and after the spacecraft flew past Pluto in 2015 has come up empty.

    “It’s a very long paper to say we didn’t find anything,” says team member Tod Lauer of the analysis, posted online September 23 at arXiv.org. But the nonresult could help scientists...

    10/04/2017 - 11:30 Astronomy, Planetary Science
  • News in Brief

    Ice gave Pluto a heavy heart

    Pluto’s heart might carry a heavy burden.

    Weight from massive deposits of frozen nitrogen, methane and carbon monoxide, built up billions of years ago, could have carved out the left half of the dwarf planet’s heart-shaped landscape, researchers report online November 30 in Nature.

    The roughly 1,000-kilometer-wide frozen basin dubbed Sputnik Planitia was on display when the New...

    11/30/2016 - 13:00 Planetary Science
  • News in Brief

    Possibly cloudy forecast for parts of Pluto

    PASADENA, Calif. — The forecast on Pluto is clear with less than a 1 percent chance of clouds. Images from the New Horizons spacecraft show hints of what could be a few isolated clouds scattered around the dwarf planet, the first seen in otherwise clear skies.

    Seven cloud candidates appear to hug the ground in images taken shortly after the probe buzzed by the planet in July 2015. Along...

    10/19/2016 - 15:05 Planetary Science
  • Science Ticker

    A salty sea could lurk beneath the heart of Pluto

    A salty ocean more than 100 kilometers deep might lurk beneath Pluto’s icy heart, a new study suggests. The buried reservoir could have helped tip the dwarf planet over at some point in its past, bringing the heart-shaped region in line with gravitational forces from Charon, Pluto’s largest moon.

    A subsurface ocean isn’t a new idea; researchers proposed the possibility in March to...

    09/23/2016 - 17:00 Planetary Science
  • News in Brief

    Source of Charon’s red north pole is probably Pluto

    The ruddy north pole of Charon, the largest moon of Pluto, is probably a stain from Pluto itself, researchers report online September 14 in Nature. Methane gas wafting from Pluto’s surface sticks to the frigid pole during the moon’s decades-long winter; ultraviolet light from the sun then transforms the methane into reddish organic goop known as tholins.

    Planetary scientist Will Grundy...

    09/14/2016 - 13:40 Planetary Science
  • Science Ticker

    Source of Charon’s red north pole is probably Pluto

    The ruddy north pole on Charon, the largest moon of Pluto, is probably a stain from Pluto itself, researchers report online September 14 in Nature. Methane gas wafting from Pluto’s surface sticks to the frigid pole during the moon’s decades-long winter; ultraviolet light from the sun then transforms the methane into reddish organic goop known as tholins.

    Pluto’s methane has been a...

    09/14/2016 - 13:00 Planetary Science
  • The List

    Get your Pluto trivia down cold

    It has been eight months since the New Horizons spacecraft flew past Pluto (SN Online: 7/15/15), but the discoveries keep trickling in. Mission scientists have now recapped the latest findings in five papers published online March 17 in Science. Science News has previously reported on many of these findings, but to mark those months of discovery, here are nine newsy nuggets about our favorite...

    03/17/2016 - 14:00 Planetary Science
  • Science Ticker

    Mountains on Pluto are a winter wonderland of methane snow

    Over the ground lies a mantle of white — on Pluto. Snow-capped peaks on the dwarf planet dot an otherwise ruddy terrain. But these snowy summits appear to be composed of methane, not water, researchers report online March 3.

    Mountain tops in Pluto’s Cthulhu Regio, a dark landscape abutting the planet’s famous heart, reflect more light than the surrounding area. The New Horizons...

    03/07/2016 - 15:41 Planetary Science