Mercury is more shriveled than originally thought

By Science News Staff, 18:42 PM March 14, 2014

Guest post by Christopher Crockett

Like a week-old party balloon, Mercury has shrunk over the last 4.6 billion years. And a vastly improved atlas of the scorched planet, courtesy of the MESSENGER spacecraft, shows it’s shriveled more than previously thought. The closest planet to the sun has tightened its belt by about seven kilometers during most of its life, bringing observations in line with computer models that describe Mercury’s inner workings, researchers report March 16 in Nature Geosci...

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