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Planetary Science

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Pluto's haze

HEAT SHIELD  Layers of haze in Pluto’s atmosphere, shown here in an image from the New Horizons spacecraft, could radiate heat away from the dwarf planet and cool it down.

Illustration of New Horizons' next target

NEW HORIZONS’ NEXT POSTCARD  The New Horizons spacecraft will fly by the object known as (486958) 2014 MU69 on January 1, 2019. This artist’s rendition depicts the probe’s target as a binary pair.

cutaway illustration of Enceladus

A HEART OF SAND  Friction in Enceladus’ porous core (illustrated in gray) could help heat the ocean (dark blue) beneath its icy surface (light blue) enough to stay liquid for billions of years.

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