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Shedding light on Pluto’s glaciers

20 September 2016 Astronomy Now

What is the origin of the large heart-shaped nitrogen glacier on Pluto revealed by NASA’s New Horizons spacecraft in 2015? Two French researchers show that Pluto’s peculiar insolation and atmosphere favour nitrogen condensation near the equator, in the lower altitude regions, leading to an accumulation of ice at the bottom of Sputnik Planum, a vast topographic basin.

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Dwarf planet Haumea’s lunar system smaller than anticipated

17 May 2016 Astronomy Now

Haumea, a dwarf planet on the edge of our solar system, doesn’t have the same kind of moons as its well-known cousin Pluto according to a new study. This is despite original evidence that suggested they both formed in similar giant impacts and adds to the mystery shrouding how these icy bodies formed.

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New Horizons finds possible ice volcanoes on Pluto

9 November 2015 Astronomy Now

From possible ice volcanoes to twirling moons, NASA’s New Horizons science team is discussing more than 50 exciting discoveries about Pluto at this week’s 47th Annual Meeting of the American Astronomical Society’s Division for Planetary Sciences. The two cryovolcano candidates are large features measuring tens of miles across and several miles high.

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Latest New Horizons images of Pluto and Charon delight and amaze

10 September 2015 Astronomy Now

New close-up images of Pluto from NASA’s New Horizons spacecraft reveal a bewildering variety of surface features that have scientists reeling because of their range and complexity. Images downlinked in the past few days reveal new features as diverse as possible dunes, nitrogen ice flows oozing out of mountainous regions onto plains, and even networks of valleys possibly carved by material flowing over Pluto’s surface.

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Extended haze in Pluto’s atmosphere

25 July 2015 Astronomy Now

Backlit by the Sun, Pluto’s atmosphere rings its silhouette like a luminous halo in this image taken by NASA’s New Horizons spacecraft on July 15. This global portrait of the atmosphere was captured when the spacecraft was about 1.25 million miles (2 million kilometres) from the dwarf planet.

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New Horizons discovers flowing ices on Pluto

25 July 2015 Astronomy Now

NASA’s New Horizons mission has found evidence of exotic ices flowing across Pluto’s surface, at the left edge of its bright heart-shaped area. New close-up images from the spacecraft’s Long-Range Reconnaissance Imager (LORRI) reveal signs of recent geologic activity, something scientists hoped to find but didn’t expect.