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1 Pluto shows changing colour in new images
1 Month Ago - Thursday, February 4, 2010 vote unvote 1 hits
CBC News
NASA released the most detailed set of images ever made of Pluto on Thursday, revealing that the dwarf planet looks significantly different from the last time such pictures were taken.
A map of Pluto was constructed from multiple images from the Hubble Space Telescope taken from 2002 to 2003.
NASA said the changes in colour and brightness took place during the period from 2000 to 2002, and most likely show that sheets of nitrogen ice are shifting and sublimating, transitioning from a solid directly to a gas.
As Pluto moves into a new season in its 248-year-long cycle, more sunlight is shining on the north pole, causing nitrogen ice there to sublimate and refreeze on the south pole.
