The giant pearl-like picture caught my attention and the story was fairly interesting. Here is the link to the full story and an excerpt from it.
Hubble sees Pluto changing color, ice sheet cover
By SETH BORENSTEIN
AP Science Writer
Posted: Thursday, Feb. 04, 2010
"The photos, released by NASA Thursday, paint a Pluto that is significantly redder than it had been for the past several decades. To the layman, it has a yellow-orange hue, but astronomers say it has about 20 percent more red than it used to have.
The pictures show icy frozen nitrogen on Pluto's surface growing and shrinking, brightening in the north and darkening in the south. Astronomers say Pluto's surface is changing more than the surfaces of other bodies in the solar system. That's unexpected because a season lasts 120 years in some regions of Pluto."
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